Espen Røysamb

• Helland, Maren Sand; Holt, Tonje; Gustavson, Kristin; Larsen, Linda Paarup Neigaard & Røysamb, Espen (2021). Validation and short-form development of Conflict and Problem-solving Strategy Scales. Journal of Family Studies. ISSN 1322-9400. p. 1–20. doi: 10.1080/13229400.2021.1981977.
• Veer, Ilya M.; ..., ...; Engen, Haakon; Askelund, Adrian Dahl; Hofgaard, Live Skow & Røysamb, Espen [Show all 8 contributors for this article] (2021). Psycho-social factors associated with mental resilience in the Corona lockdown. Translational Psychiatry. ISSN 2158-3188.
• Wertz, Jasmin; Israel, Salomon; Arseneault, Louise; Belsky, Daniel W; Bourassa, Kyle & Harrington, HonaLee [Show all 12 contributors for this article] (2021). Vital personality scores and healthy aging: Life-course associations and familial transmission. Social Science and Medicine. ISSN 0277-9536.
• Krys, Kuba; Yeung, June; ..., ...; Røysamb, Espen; et al, ... & Vignoles, Vivian L. (2021). Societal emotional environments and cross- cultural differences in life satisfaction: A forty-nine country study. Journal of Positive Psychology. ISSN 1743-9760.
• Helland, Maren Sand; Lyngstad, Torkild Hovde; Holt, Tonje; Larsen, Linda Paarup Neigaard & Røysamb, Espen (2021). Effects of Covid-19 lockdown on parental functioning in vulnerable families. Journal of Marriage and Family. ISSN 0022-2445. 83(5), p. 1515–1526. doi: 10.1111/jomf.12789. Full text in Research Archive
• Krys, Kuba; Yeung, June Chun; Capaldi, Colin A.; Lun, Vivian Miu-Chi; Torres, Claudio & van Tilburg, Wijnand A. P. [Show all 63 contributors for this article] (2021). Societal emotional environments and cross-cultural differences in life satisfaction: A forty-nine country study. Journal of Positive Psychology. ISSN 1743-9760. doi: 10.1080/17439760.2020.1858332.
• Hofgaard, Live Skow; Nes, Ragnhild Bang & Røysamb, Espen (2021). Introducing two types of psychological resilience with partly unique genetic and environmental sources. Scientific Reports. ISSN 2045-2322. 11(1), p. 1–13. doi: 10.1038/s41598-021-87581-5.
• Seglem, Karoline Brobakke; Ørstavik, Ragnhild; Torvik, Fartein Ask; Røysamb, Espen & Vollrath, Margarete E. (2020). Education differences in sickness absence and the role of health behaviors: a prospective twin study. BMC Public Health. ISSN 1471-2458. 20. doi: 10.1186/s12889-020-09741-y. Full text in Research Archive
• Krys, Kuba; Park, Joonha; Kocimska-Zych, Agata; Kosiarczyk, Aleksandra; Selim, Heyla A. & Wojtczuk-Turek, Agnieszka [Show all 64 contributors for this article] (2020). Personal life satisfaction as a measure of societal happiness is an individualistic presumption: Evidence from fifty countries. Journal of Happiness Studies. ISSN 1389-4978. p. 1–18. doi: 10.1007/s10902-020-00311-y. Full text in Research Archive
• Oppedal, Brit; Ramberg, Visnja & Røysamb, Espen (2020). The asylum-process, bicultural identity and depression among unaccompanied young refugees. Journal of Adolescence. ISSN 0140-1971. 85, p. 59–69. doi: 10.1016/j.adolescence.2020.07.007. Full text in Research Archive
• Jin, Fufen; Schjølberg, Synnve; Eadie, Patricia; Nes, Ragnhild Bang & Røysamb, Espen (2020). Preschool speech intelligibility and 8-year literacy: A moderated mediation analysis. Journal of Speech, Language and Hearing Research. ISSN 1092-4388. 63(10), p. 3380–3391. doi: 10.1044/2020_JSLHR-19-00394.
• Helland, Siri Saugestad; Røysamb, Espen; Brandlistuen, Ragnhild Eek; Melby-Lervåg, Monica & Gustavson, Kristin (2020). A Common Family Factor Underlying Language Difficulties and Internalizing Problems: Findings From a Population-Based Sibling Study. Journal of Learning Disabilities. ISSN 0022-2194. 53(5), p. 399–409. doi: 10.1177/0022219420911634. Full text in Research Archive
• Nilsen, Fredrik A.; Bang, Henning; Boe, Ole; Martinsen, Øyvind L.; Lang-Ree, Ole Christian & Røysamb, Espen (2020). The Multidimensional Self-Control Scale (MSCS): Development and validation. Psychological Assessment. ISSN 1040-3590. 32(11), p. 1057–1074. doi: 10.1037/pas0000950.
• Jin, Fufen; Schjølberg, Synnve; Wang, Mari Vaage; Eadie, Patricia; Nes, Ragnhild Bang & Røysamb, Espen [Show all 7 contributors for this article] (2020). Predicting Literacy Skills at 8 Years From Preschool Language Trajectories: A Population-Based Cohort Study. Journal of Speech, Language and Hearing Research. ISSN 1092-4388. 63(8), p. 2752–2762. doi: 10.1044/2020_JSLHR-19-00286. Full text in Research Archive Show summary

  Purpose This article explored the predictive values of three main language delay (LD) trajectories (i.e., persistent, late onset, and transient) across 3-5 years on poor literacy at 8 years. Additionally, the effect of gender was assessed, using both gender-neutral and gender-specific thresholds. Method The data comprised mother-reported questionnaire data for 8,371 children in the Norwegian Mother, Father, and Child Cohort Study. Analyses were conducted using binary logistic regression in SPSS to make predictions about risk. Results LD reported at preschool age was associated with excess risk of poor literacy at 8 years with odds ratios ranging from 3.19 to 9.75 dependent on trajectory, persistent LD being the strongest predictor. The odds ratio of transient LD was similar to that of late-onset LD. Gender was not found to play an important role in the association between oral language and literacy, as the gender difference disappeared when gender-specific deficit criterion was used. Conclusion Our study supports the longitudinal association between preschool oral language and school-aged literacy skills and highlights the importance of different LD trajectories across preschool ages in predicting later literacy. Furthermore, practitioners are recommended to consider gender-specific cutoffs in relation to language and literacy measures.

• Oppedal, Brit; Keles, Serap; Cheah, Charissa & Røysamb, Espen (2020). Culture competence and mental health across different immigrant and refugee groups. BMC Public Health. ISSN 1471-2458. 20. doi: 10.1186/s12889-020-8398-1. Full text in Research Archive
• Lund, Ingunn Olea; Eilertsen, Espen Moen; Gjerde, Line C.; Torvik, Fartein Ask; Røysamb, Espen & Reichborn-Kjennerud, Ted [Show all 7 contributors for this article] (2020). Maternal Drinking and Child Emotional and Behavior Problems. Pediatrics. ISSN 0031-4005. 145(3). doi: 10.1542/peds.2019-2007. Full text in Research Archive
• Træen, Bente & Røysamb, Espen (2020). Compatibility of riders’ personality traits and the perceived personality of their horse. Human-Animal Interaction Bulletin. ISSN 2333-522X. 9(2), p. 46–61.
• Seglem, Karoline Brobakke; Torvik, Fartein Ask; Røysamb, Espen; Gjerde, Line C.; Magnus, Per & Reichborn-Kjennerud, Ted [Show all 8 contributors for this article] (2019). A Life Course Study of Genetic and Environmental Influences on Work Incapacity. Twin Research and Human Genetics. ISSN 1832-4274. p. 1–7. doi: 10.1017/thg.2019.116. Full text in Research Archive
• Gjerde, Line C.; Eilertsen, Espen Moen; Hannigan, Laurie; Eley, Thalia C.; Røysamb, Espen & Reichborn-Kjennerud, Ted [Show all 9 contributors for this article] (2019). Associations between maternal depressive symptoms and risk for offspring early-life psychopathology: the role of genetic and non-genetic mechanisms. Psychological Medicine. ISSN 0033-2917. doi: 10.1017/s0033291719003301. Full text in Research Archive
• Kleppestø, Thomas Haarklau; Czajkowski, Nikolai Olavi; Vassend, Olav; Røysamb, Espen; Eftedal, Nikolai Haahjem & Sheehy-Skeffington, Jennifer [Show all 8 contributors for this article] (2019). Correlations between social dominance orientation and political attitudes reflect common genetic underpinnings. Proceedings of the National Academy of Sciences of the United States of America. ISSN 0027-8424. 116(36), p. 17741–17746. doi: 10.1073/pnas.1818711116. Full text in Research Archive
• Holt, Tonje; Helland, Maren Sand; Gustavson, Kristin; Cummings, Edward Mark; Ha, Anh & Røysamb, Espen (2019). Assessing Children’s Responses to Interparental Conflict: Validation and Short Scale Development of SIS and CPIC-Properties Scales. Journal of Abnormal Child Psychology. ISSN 0091-0627. p. 1–20. doi: 10.1007/s10802-019-00586-7.
• Gustavson, Kristin; Røysamb, Espen & Borren, Ingrid (2019). Preventing bias from selective non-response in population-based survey studies: findings from a Monte Carlo simulation study. BMC Medical Research Methodology. ISSN 1471-2288. 19. doi: 10.1186/s12874-019-0757-1. Full text in Research Archive
• Lund, Ingunn Olea; Eilertsen, Espen Moen; Gjerde, Line C.; Røysamb, Espen; Wood, Mollie & Reichborn-Kjennerud, Ted [Show all 7 contributors for this article] (2019). Is the association between maternal alcohol consumption in pregnancy and pre-school child behavioural and emotional problems causal? Multiple approaches for controlling unmeasured confounding. Addiction. ISSN 0965-2140. 114(6), p. 1004–1014. doi: 10.1111/add.14573. Full text in Research Archive
• Træen, Bente; Øhrn-Finstad, Katrine & Røysamb, Espen (2019). Perfect riders. Personality, Perfectionism and Mental Health in Norwegian Competition Riders. Journal of Equine Veterinary Science. ISSN 0737-0806. 75, p. 82–89. doi: 10.1016/j.jevs.2019.01.016. Full text in Research Archive
• Czajkowski, Nikolai Olavi; Aggen, Steven H.; Krueger, Robert F; Kendler, Kenneth S.; Neale, Michael C. & Knudsen, Gun Peggy [Show all 10 contributors for this article] (2018). A Twin Study of Normative Personality and DSM-IV Personality Disorder Criterion Counts: Evidence for Separate Genetic Influences. American Journal of Psychiatry. ISSN 0002-953X. 175(7), p. 649–656. doi: 10.1176/appi.ajp.2017.17050493.
• Gjerde, Line C.; Eilertsen, Espen Moen; Eley, Thalia C.; McAdams, Tom A.; Reichborn-Kjennerud, Ted & Røysamb, Espen [Show all 7 contributors for this article] (2018). Maternal Perinatal and Concurrent Anxiety and Mental Health Problems in Early Childhood: A Sibling‐Comparison Study. Child Development. ISSN 0009-3920. doi: 10.1111/cdev.13192. Full text in Research Archive
• Eilertsen, Espen Moen; Gjerde, Line C.; Kendler, Kenneth S.; Røysamb, Espen; Aggen, Steven H. & Gustavson, Kristin [Show all 8 contributors for this article] (2018). Development of ADHD symptoms in preschool children: Genetic and environmental contributions. Development and Psychopathology. ISSN 0954-5794. 31(4), p. 1299–1305. doi: 10.1017/S0954579418000731. Full text in Research Archive
• Røysamb, Espen; Nes, Ragnhild Bang; Czajkowski, Nikolai Olavi & Vassend, Olav (2018). Genetics, personality and wellbeing. A twin study of traits, facets and life satisfaction. Scientific Reports. ISSN 2045-2322. 8. doi: 10.1038/s41598-018-29881-x. Full text in Research Archive
• Dyrdal, Gunvor Marie; Røysamb, Espen; Nes, Ragnhild Bang & Vittersø, Joar (2018). When Life Happens: Investigating Short and Long-Term Effects of Life Stressors on Life Satisfaction in a Large Sample of Norwegian Mothers. Journal of Happiness Studies. ISSN 1389-4978. 20(6), p. 1689–1715. doi: 10.1007/s10902-018-0024-x. Full text in Research Archive
• Morken, Ida Sund; Røysamb, Espen; Nilsen, Wendy & Karevold, Evalill Bølstad (2018). Body Dissatisfaction and Depressive Symptoms on the Threshold to Adolescence: Examining Gender Differences in Depressive Symptoms and the Impact of Social Support. Journal of Early Adolescence. ISSN 0272-4316. 39(6), p. 814–838. doi: 10.1177/0272431618791280.
• Vassend, Olav; Røysamb, Espen; Nielsen, Christopher Sivert & Czajkowski, Nikolai Olavi (2018). Fatigue symptoms in relation to neuroticism, anxiety-depression, and musculoskeletal pain. A longitudinal twin study. PLOS ONE. ISSN 1932-6203. 13(6). doi: 10.1371/journal.pone.0198594. Full text in Research Archive
• Løchen, Kristin Garaas; Nilsen, Wendy & Røysamb, Espen (2018). Associations Between Paternal and Adolescent Depressive Symptoms. In Mathiesen, Kristin Schjelderup; Sanson, Ann & Karevold, Evalill Bølstad (Ed.), Tracking Opportunities and Problems From Infancy to Adulthood. Hogrefe & Huber Publishers. ISSN 9780889375437. p. 183–196.
• Magnus, Maria Christine; Wright, Rosalind J.; Røysamb, Espen; Parr, Christine Louise; Karlstad, Øystein & Page, Christian [Show all 10 contributors for this article] (2018). Association of Maternal Psychosocial Stress with Increased Risk of Asthma Development in Offspring. American Journal of Epidemiology. ISSN 0002-9262. 187(6), p. 1199–1209. doi: 10.1093/aje/kwx366. Show summary

  Prenatal maternal psychosocial stress might influence childhood asthma development. Evaluating paternal psychosocial stress and conducting a sibling comparison could provide further insight into the role of unmeasured confounding. We examined the associations of parental psychosocial stress during and after pregnancy with asthma at 7 years in the Norwegian Mother and Child Cohort Study (n = 63,626). Measures of psychosocial stress included lifetime major depressive symptoms, current anxiety/depression symptoms, use of antidepressants, anxiolytics and/or hypnotics, life satisfaction, relationship satisfaction, work stress and social support. Childhood asthma was associated with maternal lifetime major depressive symptoms, adjusted relative risk (aRR) = 1.19 (95% CI: 1.09, 1.30), in addition to symptoms of anxiety/depression during pregnancy, aRR = 1.17 (95% CI: 1.06, 1.29), and 6 months after delivery, aRR = 1.17 (95% CI: 1.07, 1.28). Maternal negative life events during pregnancy, aRR = 1.10 (95% CI: 1.06, 1.13), and 6 months after delivery, aRR = 1.14 (95% CI: 1.11, 1.18), were also associated with asthma. These associations were not replicated when evaluated within sibling groups. There were no associations with paternal psychosocial stress. In conclusion, maternal anxiety/depression and negative life events was associated with offspring asthma, but this might be explained by unmeasured maternal background characteristics that remain stable across deliveries.

• Helland, Siri Saugestad; Røysamb, Espen; Wang, Mari Vaage & Gustavson, Kristin (2018). Language difficulties and internalizing problems: Bidirectional associations from 18 months to 8 years among boys and girls. Development and Psychopathology. ISSN 0954-5794. 30(4), p. 1239–1252. doi: 10.1017/S0954579417001559.
• Torvik, Fartein Ask; Rosenström, Tom Henrik; Ystrøm, Eivind; Tambs, Kristian; Røysamb, Espen & Czajkowski, Nikolai Olavi [Show all 10 contributors for this article] (2017). Stability and change in etiological factors for alcohol use disorder and major depression. Journal of Abnormal Psychology. ISSN 0021-843X. 126(6), p. 812–822. doi: 10.1037/abn0000280. Full text in Research Archive
• Seglem, Karoline Brobakke; Ørstavik, Ragnhild; Torvik, Fartein Ask; Gjerde, Line C.; Røysamb, Espen & Reichborn-Kjennerud, Ted [Show all 8 contributors for this article] (2017). Pre-pregnancy mental distress and musculoskeletal pain and sickness absence during pregnancy-a twin cohort study. European Journal of Public Health. ISSN 1101-1262. 27(3), p. 477–481. doi: 10.1093/eurpub/ckw267.
• Løvoll, Helga Synnevåg; Røysamb, Espen & Vittersø, Joar (2017). Experiences matter: Positive emotions facilitate intrinsic motivation. Cogent Psychology. ISSN 2331-1908. 4. doi: 10.1080/23311908.2017.1340083. Full text in Research Archive
• Nilsen, Wendy; Kjeldsen, Anne; Karevold, Evalill Bølstad; Skipstein, Anni; Helland, Maren Sand & Gustavson, Kristin [Show all 11 contributors for this article] (2017). Cohort profile: The Tracking Opportunities and Problems Study (TOPP) – A study of Norwegian children and their parents followed from infancy to adulthood. International Journal of Epidemiology. ISSN 0300-5771. 46(5), p. 1399–1399g. doi: 10.1093/ije/dyx057. Full text in Research Archive
• Eilertsen, Espen Moen; Gjerde, Line C.; Reichborn-Kjennerud, Ted; Ørstavik, Ragnhild; Knudsen, Gun Peggy & Stoltenberg, Camilla [Show all 10 contributors for this article] (2017). Maternal alcohol use during pregnancy and offspring attention-deficit hyperactivity disorder (ADHD): a prospective sibling control study. International Journal of Epidemiology. ISSN 0300-5771. 46(5), p. 1633–1640. doi: 10.1093/ije/dyx067. Full text in Research Archive
• Vassend, Olav; Røysamb, Espen; Nielsen, Christopher Sivert & Czajkowski, Nikolai Olavi (2017). Musculoskeletal Complaints, Anxiety–Depression Symptoms, and Neuroticism: A Study of Middle-Aged Twins. Health Psychology. ISSN 0278-6133. 36(8), p. 729–739. doi: 10.1037/hea0000484.
• Helland, Maren Sand; Kjeldsen, Anne; von Soest, Tilmann; Røysamb, Espen; Gustavson, Kristin & Nilsen, Wendy (2017). Parental Child-Rearing Conflicts Through Adolescence: Trajectories and Associations With Child Characteristics and Externalizing Patterns. Journal of Research on Adolescence. ISSN 1050-8392. 27(2), p. 379–391. doi: 10.1111/jora.12302. Full text in Research Archive
• Gjerde, Line C.; Eilertsen, Espen Moen; Reichborn-Kjennerud, Ted; McAdams, Tom A.; Zachrisson, Henrik Daae & Zambrana, Imac Maria [Show all 9 contributors for this article] (2017). Maternal perinatal and concurrent depressive symptoms and child behavior problems: a sibling comparison study. Journal of Child Psychology and Psychiatry. ISSN 0021-9630. 58(7), p. 779–786. doi: 10.1111/jcpp.12704. Full text in Research Archive
• Hermansen, Tone Kristine; Yrttiaho, Santeri; Røysamb, Espen & Melinder, Annika Maria D (2017). Perceptual interference processing in preschool children, with and without prenatal exposure to selective serotonin reuptake inhibitors. Psychopharmacology. ISSN 0033-3158. 234(3), p. 339–351. doi: 10.1007/s00213-016-4467-7.
• Torvik, Fartein Ask; Reichborn-Kjennerud, Ted; Gjerde, Line C.; Knudsen, Gun Peggy; Ystrøm, Eivind & Tambs, Kristian [Show all 9 contributors for this article] (2016). Mood, anxiety, and alcohol use disorders and later cause-specific sick leave in young adult employees. BMC Public Health. ISSN 1471-2458. 16. doi: 10.1186/s12889-016-3427-9. Full text in Research Archive
• Vassend, Olav; Orvik, Benedicte Humborstad; Czajkowski, Nikolai Olavi & Røysamb, Espen (2016). Facets of neuroticism and musculoskeletal symptoms. A study of middle-aged twins. Norsk Epidemiologi. ISSN 0803-2491. 26(1-2), p. 47–56. doi: 10.5324/nje.v26i1-2.2015.
• Røysamb, Espen & Tambs, Kristian (2016). The beauty, logic and limitations of twin studies. Norsk Epidemiologi. ISSN 0803-2491. 26(1-2), p. 35–46. doi: 10.5324/nje.v26i1-2.2014. Full text in Research Archive
• Nes, Ragnhild Bang & Røysamb, Espen (2016). Happiness in Behaviour Genetics: An Update on Heritability and Changeability. Journal of Happiness Studies. ISSN 1389-4978. doi: 10.1007/s10902-016-9781-6.
• Ørstavik, Ragnhild; Knudsen, Gun Peggy; Tambs, Kristian; Gjerde, Line C.; Torvik, Fartein Ask & Nielsen, Christopher Sivert [Show all 8 contributors for this article] (2016). Musculoskeletal pain and work absence – a 10 year follow-up study of Norwegian young adult twins. Norsk Epidemiologi. ISSN 0803-2491. 26(1-2), p. 69–75. doi: 10.5324/nje.v26i1-2.2018.
• Aakvaag, Helene Flood; Thoresen, Siri; Wentzel-Larsen, Tore; Dyb, Grete; Røysamb, Espen & Olff, Miranda (2016). Broken and guilty since it happened: A population study of trauma-related shame and guilt after violence and sexual abuse. Journal of Affective Disorders. ISSN 0165-0327. 204, p. 16–23. doi: 10.1016/j.jad.2016.06.004.
• Hermansen, Tone Kristine; Røysamb, Espen; Augusti, Else-Marie & Melinder, Annika Maria D (2016). Behavior and inhibitory control in children with prenatal exposure to antidepressants and medically untreated depression. Psychopharmacology. ISSN 0033-3158. 233(8), p. 1523–1535. doi: 10.1007/s00213-016-4248-3.
• Gustavson, Kristin; Røysamb, Espen; Borren, Ingrid; Torvik, Fartein Ask & Karevold, Evalill Bølstad (2016). Life Satisfaction in Close Relationships: Findings from a Longitudinal Study. Journal of Happiness Studies. ISSN 1389-4978. 17(3), p. 1293–1311. doi: 10.1007/s10902-015-9643-7.
• Reichborn-Kjennerud, Ted; Czajkowski, Nikolai Olavi; Ystrøm, Eivind; Ørstavik, Ragnhild; Aggen, Steven H. & Tambs, Kristian [Show all 12 contributors for this article] (2015). A longitudinal twin study of borderline and antisocial personality disorder traits in early to middle adulthood. Psychological Medicine. ISSN 0033-2917. 45(14), p. 3121–3131. doi: 10.1017/S0033291715001117.
• Idstad, Mariann; Torvik, Fartein Ask; Borren, Ingrid; Rognmo, Kamilla; Røysamb, Espen & Tambs, Kristian (2015). Mental distress predicts divorce over 16 years: The HUNT study Health behavior, health promotion and society. BMC Public Health. ISSN 1471-2458. 15. doi: 10.1186/s12889-015-1662-0. Full text in Research Archive
• Gjerde, Line C.; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ystrøm, Eivind; Tambs, Kristian & Aggen, Steven H. [Show all 10 contributors for this article] (2015). A longitudinal, population-based twin study of avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood. Psychological Medicine. ISSN 0033-2917. 45(16), p. 3539–3548. doi: 10.1017/S0033291715001440.
• Træen, Bente; Westerberg, Ane Cecilie; Ono Njøten, Mette & Røysamb, Espen (2015). Predictors of Self-Efficacy in Norwegian Competition Riders. Journal of Equine Veterinary Science. ISSN 0737-0806. 35(10), p. 807–814. doi: 10.1016/j.jevs.2015.07.021.
• Torvik, Fartein Ask; Ystrøm, Eivind; Czajkowski, Nikolai Olavi; Tambs, Kristian; Røysamb, Espen & Ørstavik, Ragnhild [Show all 9 contributors for this article] (2015). Socioeconomic status and sick leave granted for mental and somatic disorders: a prospective study of young adult twins. BMC Public Health. ISSN 1471-2458. 15:134. doi: 10.1186/s12889-015-1457-3. Full text in Research Archive
• Torvik, Fartein Ask; Gustavson, Kristin; Røysamb, Espen & Tambs, Kristian (2015). Health, health behaviors, and health dissimilarities predict divorce: Results from the HUNT study. BMC Psychology. ISSN 2050-7283. 3:13, p. 1–9. doi: 10.1186/S40359-015-0072-5. Full text in Research Archive
• Røysamb, Espen; Vittersø, Joar & Tambs, Kristian (2014). The relationship satisfaction scale – Psychometric properties. Norsk Epidemiologi. ISSN 0803-2491. 24(1-2), p. 187–194. doi: 10.5324/nje.v24i1-2.1821. Full text in Research Archive
• Tambs, Kristian & Røysamb, Espen (2014). Selection of questions to short-form versions of original psychometric instruments in MoBa. Norsk Epidemiologi. ISSN 0803-2491. 24(1-2), p. 195–201. doi: 10.5324/nje.v24i1-2.1822. Full text in Research Archive
• Ørstavik, Ragnhild; Czajkowski, Nikolai Olavi; Røysamb, Espen; Knudsen, Gun Peggy; Tambs, Kristian & Reichborn-Kjennerud, Ted (2014). Sex differences in genetic and environmental influences on educational attainment and income. Twin Research and Human Genetics. ISSN 1832-4274. 17(6), p. 516–525. doi: 10.1017/thg.2014.68.
• Aakvaag, Helene Flood; Thoresen, Siri; Wentzel-Larsen, Tore; Røysamb, Espen & Dyb, Grete (2014). Shame and guilt in the aftermath of terror: the Utøya Island study. Journal of Traumatic Stress. ISSN 0894-9867. 27(5), p. 618–621. doi: 10.1002/jts.21957.
• Alves, Daniele Evelin; Gustavson, Kristin; Røysamb, Espen; Oppedal, Brit & Zachrisson, Henrik Daae (2014). Preadolescents with immigrant backgrounds: the relationship between emotional problems, parental achievement values, and comparison. Scandinavian Journal of Child and Adolescent Psychiatry and Psychology. ISSN 2245-8875. 2(3), p. 124–134. doi: 10.21307/sjcapp-2014-017. Full text in Research Archive
• Torvik, Fartein Ask; Gjerde, Line Cecilie; Røysamb, Espen; Tambs, Kristian; Kendler, Kenneth S. & Czajkowski, Nikolai Olavi [Show all 9 contributors for this article] (2014). Genetic and environmental contributions to the relationship between internalizing disorders and sick leave granted for mental and somatic disorders. Twin Research and Human Genetics. ISSN 1832-4274. 17(4), p. 225–235. doi: 10.1017/thg.2014.27.
• Helland, Maren Sand; von Soest, Tilmann; Gustavson, Kristin; Røysamb, Espen & Mathiesen, Kristin Schjelderup (2014). Long shadows: a prospective study of predictors of relationship dissolution over 17 child-rearing years. BMC Psychology. ISSN 2050-7283. 2. doi: 10.1186/s40359-014-0040-5. Full text in Research Archive
• Røysamb, Espen; Nes, Ragnhild Bang & Vittersø, Joar (2014). Well-being: heritable and changeable. In Sheldon, Kennon M & Lucas, Richard E (Ed.), Stability of happiness : theories and evidence on whether happiness can change. Academic Press. ISSN 9780124114784. p. 9–36. doi: 10.1016/B978-0-12-411478-4.00002-3.
• Gjerde, Line Cecilie; Røysamb, Espen; Czajkowski, Nikolai Olavi; Knudsen, Gun Peggy; Østby, Kristian Amundsen & Tambs, Kristian [Show all 9 contributors for this article] (2014). Personality disorders and long-term sick leave: A population-based study of young adult norwegian twins. Twin Research and Human Genetics. ISSN 1832-4274. 17(1), p. 1–9. doi: 10.1017/thg.2013.90.
• Alves, Daniele Evelin; Corliss, Heather L; Røysamb, Espen; Zachrisson, Henrik Daae; Oppedal, Brit & Gustavson, Kristin (2014). Immigrant Preadolescents and Risk of Emotional Distress. Scandinavian Journal of Child and Adolescent Psychiatry and Psychology. ISSN 2245-8875. 2(1), p. 41–51. doi: 10.21307/sjcapp-2014-007. Full text in Research Archive
• Seglem, Karoline Brobakke; Oppedal, Brit & Røysamb, Espen (2014). Daily hassles and coping dispositions as predictors of psychological adjustment: A comparative study of young unaccompanied refugees and youth in the resettlement country. International Journal of Behavioral Development. ISSN 0165-0254. 38(3), p. 293–303. doi: 10.1177/0165025414520807.
• Nes, Ragnhild Bang; Røysamb, Espen; Hauge, Lars Johan; Kornstad, Tom; Landolt, Markus A. & Irgens, Lorentz M. [Show all 9 contributors for this article] (2014). Adaptation to the birth of a child with a congenital anomaly: A prospective longitudinal study of maternal well-being and psychological distress. Developmental Psychology. ISSN 0012-1649. 50(6), p. 1827–1839. doi: 10.1037/a0035996.
• Gustavson, Kristin Brun; Nilsen, Wendy; Ørstavik, Ragnhild & Røysamb, Espen (2014). Relationship quality, divorce, and well-being: Findings from a three-year longitudinal study. Journal of Positive Psychology. ISSN 1743-9760. 9(2), p. 163–174. doi: 10.1080/17439760.2013.858274.
• Holte, Arne; Barry, Margaret M.; Bekkhus, Mona; Borge, Anne Inger Helmen; Bowes, Lucy & Casas, Ferran [Show all 25 contributors for this article] (2014). Psychology of Child Well-Being. In Ben-Arieh, Asher; Casas, Ferran; Frønes, Ivar & Korbin, Jill E. (Ed.), Handbook of child well-being : theories, methods and policies in global perspective. Springer. ISSN 978-90-481-9062-1. p. 555–631. doi: 10.1007/978-90-481-9063-8_13.
• Røsand, Gun-Mette Brandsnes; Slinning, Kari; Røysamb, Espen & Tambs, Kristian (2014). Relationship dissatisfaction and other risk factors for future relationship dissolution: a population-based study of 18,523 couples. Social Psychiatry and Psychiatric Epidemiology. ISSN 0933-7954. 49(1), p. 109–119. doi: 10.1007/s00127-013-0681-3. Show summary

  Purpose There has been a marked increase in divorce rates in most Western societies over the last 50 years. Relationship dissolution is associated with negative consequences both for adults and children, so it is important to understand the factors that help retain marital stability. The first aim of this prospective study was to identify risk factors for relationship dissolution in 18,523 couples in Norway, with a particular focus on individual dissatisfaction with the relationship. The second aim was to assess interaction effects between relationship dissatisfaction and other predictors of relationship dissolution. Methods Pregnant women and their partners enrolled in the Norwegian Mother and Child Cohort study completed questionnaires during the pregnancy that asked about relationship dissatisfaction, strain, demographics, and other risk factors. The main outcome variable was relationship dissolution in the 39-month period from gestational week 30–36 months postpartum. Associations between the risk factors and relationship dissolution were estimated by logistic regression analysis. Results Except for younger female age, relationship dissatisfaction in women and lower education in men, were the strongest predictors of relationship dissolution. Another strong factor was women’s persistent strain. No significant interaction effects were found between relationship dissatisfaction and the other variables in the analyses. Conclusions Dissatisfaction with the relationship, in particular in women, and low male education are important predictors of relationship dissolution, although other factors are also related to dissolution. There are only few studies on relationship predictors of dissolution conducted in Europe, and the current study adds to this body of knowledge

• Nilsen, Thomas Sevenius; Knudsen, Gun Peggy; Gervin, Kristina; Brandt, Ingunn; Røysamb, Espen & Tambs, Kristian [Show all 11 contributors for this article] (2013). The Norwegian twin registry from a public health perspective: a research update. Twin Research and Human Genetics. ISSN 1832-4274. 16(1), p. 285–295. doi: 10.1017/thg.2012.117.
• Nes, Ragnhild Bang; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ørstavik, Ragnhild; Tambs, Kristian & Reichborn-Kjennerud, Ted (2013). Major depression and life satisfaction: A population-based twin study. Journal of Affective Disorders. ISSN 0165-0327. 144(1-2), p. 51–58. doi: 10.1016/j.jad.2012.05.060.
• Nilsen, Wendy; Karevold, Evalill Bølstad; Røysamb, Espen; Gustavson, Kristin Brun & Mathiesen, Kristin Schjelderup (2013). Social skills and depressive symptoms across adolescence: Social support as a mediator in girls versus boys. Journal of Adolescence. ISSN 0140-1971. 36(1), p. 11–20. doi: 10.1016/j.adolescence.2012.08.005.
• Nilsen, Wendy; Gustavson, Kristin Brun; Kjeldsen, Anne; Røysamb, Espen & Karevold, Evalill Bølstad (2013). Pathways from maternal distress and child problem behavior to adolescent depressive symptoms – A prospective examination from 18 months to 17 years of age. Journal of Developmental and Behavioral Pediatrics. ISSN 0196-206X. 34(5), p. 303–313. doi: 10.1097/DBP.0b013e318293ab05.
• Rognmo, Kamilla; Torvik, Fartein Ask; Røysamb, Espen & Tambs, Kristian (2013). Alcohol use and spousal mental distress in a population sample: the nord-trondelag health study. BMC Public Health. ISSN 1471-2458. 13. doi: 10.1186/1471-2458-13-319. Full text in Research Archive
• Gjerde, Line Cecilie; Knudsen, Gun Peggy; Czajkowski, Nikolai Olavi; Gillespie, Nathan; Aggen, Steven H & Røysamb, Espen [Show all 10 contributors for this article] (2013). Genetic and Environmental Contributions to Long-Term Sick Leave and Disability Pension: A Population-Based Study of Young Adult Norwegian Twins. Twin Research and Human Genetics. ISSN 1832-4274. 16(4), p. 759–766. doi: 10.1017/thg.2013.36.
• Vassend, Olav; Røysamb, Espen & Nielsen, Christopher Sivert (2013). Five-factor personality traits and pain sensitivity: A twin study. Pain. ISSN 0304-3959. 154(5), p. 722–728. doi: 10.1016/j.pain.2013.01.010.
• Torvik, Fartein Ask; Røysamb, Espen; Gustavson, Kristin Brun; Idstad, Mariann & Tambs, Kristian (2013). Discordant and concordant alcohol use in spouses as predictors of marital dissolution in the general population: results from the HUNT Study. Alcoholism: Clinical and Experimental Research. ISSN 0145-6008. 37(5), p. 877–884. doi: 10.1111/acer.12029.
• Torgersen, Svenn; Myers, John; Reichborn-Kjennerud, Ted; Røysamb, Espen; Kubarych, Thomas S. & Kendler, Kenneth S. (2012). The heritability of cluster B personality disorders assessed both by personal interview and questionnaire. Journal of Personality Disorders. ISSN 0885-579X. 26(6), p. 848–866. doi: 10.1521/pedi_2012_26_060. Show summary

  Whereas the heritability of common personality traits has been firmly established, the results of the few published studies on personality disorders (PDs) are highly divergent, with some studies finding high heredity and others very low. A problem with assessing personality disorders by means of interview is errors connected with interviewer bias. A way to overcome the problem is to use self-report questionnaires in addition to interviews. This study used both interview and questionnaire for assessing DSM-IV Cluster B personality disorders: antisocial personality disorder (APD), borderline (BPD), narcissistic (NPD), and histrionic (HPD). We assessed close to 2,800 twins from the Norwegian Institute of Public Health Twin Panel using a self-report questionnaire and, a few years later, the Structured Interview for DSM-IV Personality (SIDP-IV). Items from the self-report questionnaire that best predicted the PDs captured by the interview were then selected. Measurement models combining questionnaire and interview information were applied and were fitted using Mx. Whereas the heritability of Cluster B PDs assessed by interview was around .30, and around .40–.50 when assessed by self-report questionnaire, the heritability of the convergent latent factor, including information from both interview and self-report questionnaire was .69 for APD, .67 for BPD, .71 for NPD, and .63 for HPD. As is usually found for personality, the effect of shared-in families (familial) environment was zero. In conclusion, when both interview and self-report questionnaire are taken into account, the heritability of Cluster B PD appears to be in the upper range of previous findings for mental disorders.

• Gustavson, Kristin Brun; Soest, Tilmann M von; Karevold, Evalill Bølstad & Røysamb, Espen (2012). Attrition and generalizability in longitudinal studies: findings from a 15-year population-based study and a Monte Carlo simulation study. BMC Public Health. ISSN 1471-2458. 12. doi: 10.1186/1471-2458-12-918.
• Rognmo, Kamilla; Torvik, Fartein Ask; Ask, Helga; Røysamb, Espen & Tambs, Kristian (2012). Paternal and maternal alcohol abuse and offspring mental distress in the general population: the Nord-Trøndelag health study. BMC Public Health. ISSN 1471-2458. 12(1). doi: 10.1186/1471-2458-12-448. Full text in Research Archive
• Gjerde, Line Cecilie; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ørstavik, Ragnhild; Knudsen, Gun Peggy & Østby, Kristian Roald Amundsen [Show all 10 contributors for this article] (2012). The heritability of avoidant and dependent personality disorder assessed by personal interview and questionnaire. Acta Psychiatrica Scandinavica. ISSN 0001-690X. 126(6), p. 448–457. doi: 10.1111/j.1600-0447.2012.01862.x. Show summary

  Objective:  Personality disorders (PDs) have been shown to be modestly heritable. Accurate heritability estimates are, however, dependent on reliable measurement methods, as measurement error deflates heritability. The aim of this study was to estimate the heritability of DSM-IV avoidant and dependent personality disorder, by including two measures of the PDs at two time points. Method:  Data were obtained from a population-based cohort of young adult Norwegian twins, of whom 8045 had completed a self-report questionnaire assessing PD traits. 2794 of these twins subsequently underwent a structured diagnostic interview for DSM-IV PDs. Questionnaire items predicting interview results were selected by multiple regression, and measurement models of the PDs were fitted in Mx. Results:  The heritabilities of the PD factors were 0.64 for avoidant PD and 0.66 for dependent PD. No evidence of common environment, that is, environmental factors that are shared between twins and make them similar, was found. Genetic and environmental contributions to avoidant and dependent PD seemed to be the same across sexes. Conclusion:  The combination of both a questionnaire- and an interview assessment of avoidant and dependent PD results in substantially higher heritabilities than previously found using single-occasion interviews only.

• Gustavson, Kristin Brun; Røysamb, Espen; Soest, Tilmann M von; Helland, Maren Johanssson; Karevold, Evalill Bølstad & Mathiesen, Kristin Schjelderup (2012). Reciprocal longitudinal associations between depressive symptoms and romantic partners' synchronized view of relationship quality. Journal of Social and Personal Relationships. ISSN 0265-4075. 29(6), p. 776–794. doi: 10.1177/0265407512448264.
• Gustavson, Kristin Brun; Røysamb, Espen; Soest, Tilmann M von; Helland, Maren Johanssson & Mathiesen, Kristin Schjelderup (2012). Longitudinal associations between relationship problems, divorce, and life satisfaction: Findings from a 15-year population-based study. Journal of Positive Psychology. ISSN 1743-9760. 7(3), p. 188–197. doi: 10.1080/17439760.2012.671346.
• Røsand, Gun-Mette Brandsnes; Slinning, Kari; Eberhard-Gran, Malin M C; Røysamb, Espen & Tambs, Kristian (2012). The buffering effect of relationship satisfaction on emotional distress in couples. BMC Public Health. ISSN 1471-2458. 12. doi: 10.1186/1471-2458-12-66. Full text in Research Archive Show summary

  Background: Marital distress and depression frequently co-occur, and partnership quality is associated with depressive symptoms and mental disorders in both men and women. One aim of this study was to investigate the contribution of a set of risk factors for emotional distress among men and women in couples, with a special focus on satisfaction with partner relationship. The most important aim was to investigate the extent to which high relationship satisfaction in couples acts as a buffer against stressful events. Methods: Pregnant women and their husbands (n = 62,956 couples) enrolled in the Norwegian Mother and Child Cohort Study completed a questionnaire with questions about emotional distress, relationship satisfaction, and other risk factors. Twelve potential risk factors were included in the analyses, including relationship satisfaction, demographic characteristics, and somatic diseases in men and women. Associations between the predictor variables and emotional distress were estimated by multiple linear regression analysis. Cross-spousal effects, in which data reported by one of the spouses predicted emotional distress in the other, were also investigated. Possible interaction effects between certain risk factors and self-reported and partner's relationship satisfaction were tested and further explored with regression analyses in subsamples stratified by relationship satisfaction scores. Results: The unique effects of relationship satisfaction were of similar sizes for both men and women: substantial for self-reported (β = -0.23 and β = -0.28, respectively) and weak for partner-reported satisfaction (β = -0.04 and β = -0.02, respectively). Other relatively strong risk factors were somatic disease, first-time motherhood, and unemployment. Self-reported as well as partner-reported relationship satisfaction appeared to strongly buffer the effects of a number of stressors. Conclusions: Partner relationship dissatisfaction is strongly associated with emotional distress in men and women. Good partner relationship, both as perceived by the individual him(her)self and by the spouse, quite strongly moderates adverse effects of various types of emotional strain.

• Ask, Helga; Rognmo, Kamilla; Torvik, Fartein Ask; Røysamb, Espen & Tambs, Kristian (2012). Non-random mating and convergence over time for alcohol consumption, smoking and exercise: The Nord-Trondelag Health Study. Behavior Genetics. ISSN 0001-8244. 42(3), p. 354–365. doi: 10.1007/s10519-011-9509-7.
• Tambs, Kristian; Kendler, KS; Reichborn-Kjennerud, Ted; Aggen, SH; Harris, Jennifer & Neale, C [Show all 10 contributors for this article] (2012). Genetic and environmental contributions to the relationship between education and anxiety disorders - a twin study. Acta Psychiatrica Scandinavica. ISSN 0001-690X. 125(3), p. 203–212. doi: 10.1111/j.1600-0447.2011.01799.x.
• Myklestad, Ingri; Røysamb, Espen & Tambs, Kristian (2012). Risk and protective factors for psychological distress among adolescents: a family study in the Nord-Trøndelag Health Study. Social Psychiatry and Psychiatric Epidemiology. ISSN 0933-7954. 47(5), p. 771–782. doi: 10.1007/s00127-011-0380-x.
• Ørstavik, Ragnhild; Kendler, Kenneth S.; Røysamb, Espen; Czajkowski, Nikolai Olavi; Tambs, Kristian & Reichborn-Kjennerud, Ted (2012). Genetic and environmental contributions to the co-occurence of depressive personality disorder and DSM-IV personality disorders. Journal of Personality Disorders. ISSN 0885-579X. 26(3), p. 435–451. doi: 10.1521/pedi.2012.26.3.435.
• Vassend, Olav; Røysamb, Espen & Nielsen, Christopher Sivert (2012). Neuroticism and self-reported somatic health: A twin study. Psychology and Health. ISSN 0887-0446. 27(1), p. 1–12. doi: 10.1080/08870446.2010.540665.
• Zachrisson, Henrik Daae; Røysamb, Espen; Oppedal, Brit & Hauser, Stuart T. (2011). Factor structure of the child attachment interview. European Journal of Developmental Psychology. ISSN 1740-5629. 8(6), p. 744–759. doi: 10.1080/17405629.2011.631293.
• Alves, Daniele Evelin; Røysamb, Espen; Oppedal, Brit & Zachrisson, Henrik Daae (2011). Emotional problems in preadolescents in Norway: The role of gender, ethnic minority status, and home- and school-related hassles. Child and Adolescent Psychiatry and Mental Health (CAPMH). ISSN 1753-2000. 5. doi: 10.1186/1753-2000-5-37.
• Idstad, Mariann; Røysamb, Espen & Tambs, Kristian (2011). The effect of change in mental disorder status on change in spousal mental health: The HUNT study. Social Science and Medicine. ISSN 0277-9536. 73(9), p. 1408–1415. doi: 10.1016/j.socscimed.2011.07.032.
• Torvik, Fartein Ask; Rognmo, Kamilla; Ask, Helga; Røysamb, Espen & Tambs, Kristian (2011). Parental alcohol use and adolescent school adjustment in the general population: Results from the HUNT study. BMC Public Health. ISSN 1471-2458. 11. doi: 10.1186/1471-2458-11-706.
• Vassend, Olav; Røysamb, Espen & Nielsen, Christopher Sivert (2011). Dental anxiety in relation to neuroticism and pain sensitivity. A twin study. Journal of Anxiety Disorders. ISSN 0887-6185. 25(2), p. 302–308. doi: 10.1016/j.janxdis.2010.09.015.
• Røsand, Gun-Mette Brandsnes; Slinning, Kari; Eberhard-Gran, Malin M C; Røysamb, Espen & Tambs, Kristian (2011). Partner relationship satisfaction and maternal emotional distress in early pregnancy. BMC Public Health. ISSN 1471-2458. 11. doi: 10.1186/1471-2458-11-161. Show summary

  Background: Recognition of maternal emotional distress during pregnancy and the identification of risk factors for this distress are of considerable clinical- and public health importance. The mental health of the mother is important both for herself, and for the physical and psychological health of her children and the welfare of the family. The first aim of the present study was to identify risk factors for maternal emotional distress during pregnancy with special focus on partner relationship satisfaction. The second aim was to assess interaction effects between relationship satisfaction and the main predictors. Methods: Pregnant women enrolled in the Norwegian Mother and Child Cohort Study (n = 51,558) completed a questionnaire with questions about maternal emotional distress, relationship satisfaction, and other risk factors. Associations between 37 predictor variables and emotional distress were estimated by multiple linear regression analysis. Results: Relationship dissatisfaction was the strongest predictor of maternal emotional distress (β = 0.25). Other predictors were dissatisfaction at work (β = 0.11), somatic disease (β = 0.11), work related stress (β = 0.10) and maternal alcohol problems in the preceding year (β = 0.09). Relationship satisfaction appeared to buffer the effects of frequent moving, somatic disease, maternal smoking, family income, irregular working hours, dissatisfaction at work, work stress, and mother's sick leave (P < 0.05). Conclusions: Dissatisfaction with the partner relationship is a significant predictor of maternal emotional distress in pregnancy. A good partner relationship can have a protective effect against some stressors.

• Dyrdal, Gunvor Marie; Røysamb, Espen; Nes, Ragnhild Bang & Vittersø, Joar (2011). Can a happy relationship predict a happy life? A population-based study of maternal well-being during the life transition of pregnancy, infancy, and toddlerhood. Journal of Happiness Studies. ISSN 1389-4978. 12(6), p. 947–962. doi: 10.1007/s10902-010-9238-2.
• Czajkowski, Nikolai Olavi; Kendler, Kenneth S.; Tambs, Kristian; Røysamb, Espen & Reichborn-Kjennerud, Ted (2011). The structure of genetic and environmental risk factors for phobias in women. Psychological Medicine. ISSN 0033-2917. 41(9), p. 1987–1995. doi: 10.1017/S0033291710002436.
• Richter, Jörg; Sagatun, Åse; Heyerdahl, Sonja; Oppedal, Brit & Røysamb, Espen (2011). The Strengths and Difficulties Questionnaire (SDQ) - Self-Report. An analysis of its structure in a multiethnic urban adolescent sample. Journal of Child Psychology and Psychiatry. ISSN 0021-9630. 52(9), p. 1002–1011. doi: 10.1111/j.1469-7610.2011.02372.x. Show summary

  Background:  The SDQ is currently one of the internationally most frequently used screening instruments for child and adolescent mental health purposes. However, its structure, cross-cultural equivalence, and its applicability in ethnic minority groups is still a matter of discussion. Methods:  SDQ self-report data of 5,379 ethnic Norwegian and 865 ethnic minority adolescents with a variety of national origins was analysed by means of confirmatory factor analysis (CFA). Multi-group comparisons considering equal thresholds combined with more in-depth analyses on factor loadings, residuals, composite reliability, and average amount of variance explained by indicators of respective constructs were performed. Results:  CFA suggested a good fit of the five-factor model of the SDQ self-report in the subsample of ethnic Norwegian adolescents and an acceptable fit in ethnic minority subsamples without substantial differences between ethnic Norwegian SDQ data and data of Pakistani or those of ‘other ethnic minority’ adolescents. When assuming equal thresholds between response categories of the items as well as equal factor loadings the structure in the data significantly differed between ethnic Norwegian and both ethnic minority samples. Some factor loadings and some correlations between constructs significantly differed between ethnic Norwegian and both ethnic minority samples. The correlation coefficients between the hyperactivity factor and the conduct problems factor were too high in all three subsamples in order to establish distinct constructs. Composite reliability and average explained variance of the emotional symptoms factor were good in all samples, whereas they were low for some of the other factors. Conclusions:  To some extent the theoretically proposed five-factor structure of the Norwegian version of the SDQ self-report was supported in 15- to 16-year-old adolescents. However, the results of more detailed analyses raise questions about the interpretation of some subscales. When applying this screening method to Norwegian adolescents, our results suggest that the use of the total difficulty score of the SDQ in screening youth should be preferred over the subscale scores.

• Gjerde, Line Cecilie; Røysamb, Espen; Czajkowski, Nikolai Olavi; Reichborn-Kjennerud, Ted; Ørstavik, Ragnhild & Kendler, Kenneth S [Show all 7 contributors for this article] (2011). Strong Genetic Correlation Between Interview-Assessed Internalizing Disorders and a Brief Self-Report Symptom Scale. Twin Research and Human Genetics. ISSN 1832-4274. 14(1), p. 64–72. doi: 10.1375/twin.14.1.64.
• Kendler, Kenneth S; Aggen, Steven H; Knudsen, Gun Peggy Strømstad; Røysamb, Espen; Neale, Michael C & Reichborn-Kjennerud, Ted (2011). The Structure of Genetic and Environmental Risk Factors for Syndromal and Subsyndromal Common DSM-IV Axis I and All Axis II Disorders. American Journal of Psychiatry. ISSN 0002-953X. 168(1), p. 29–39. doi: 10.1176/appi.ajp.2010.10030340.
• Røysamb, Espen; Kendler, Kenneth S; Tambs, Kristian; Ørstavik, Ragnhild; Aggen, Steven H & Neale, Michael C [Show all 8 contributors for this article] (2011). The joint structure of DSM-IV Axis I and Axis II disorders. Journal of Abnormal Psychology. ISSN 0021-843X. 120(1), p. 198–209. doi: 10.1037/a0021660.
• Dalhaug, Caroline; Oppedal, Brit & Røysamb, Espen (2011). The role of sociocultural context for culture competence and depressive symptoms among ethnic minority youths in junior high school. European Journal of Developmental Psychology. ISSN 1740-5629. 8(3), p. 280–294. doi: 10.1080/17405621003710843.
• Vittersø, Joar; Søholt, Yngvil; Hetland, Audun; Thoresen, Irina Aleksejeva & Røysamb, Espen (2010). Was Hercules happy? Some answers from a functional model of human well-being. Social Indicators Research. ISSN 0303-8300. 95(1), p. 1–18. doi: 10.1007/s11205-009-9447-4.
• Reichborn-Kjennerud, Ted; Czajkowski, Nikolai; Røysamb, Espen; Ørstavik, Ragnhild Elise; Neale, Michael C & Torgersen, Svenn [Show all 7 contributors for this article] (2010). Major depression and dimensional representations of DSM-IV personality disorders: a population-based twin study. Psychological Medicine. ISSN 0033-2917. 40(9), p. 1475–1484. doi: 10.1017/S0033291709991954.
• Czajkowski, Nikolai; Røysamb, Espen; Reichborn-Kjennerud, Ted & Tambs, Kristian (2010). A population based family study of symptoms of anxiety and depression The HUNT study. Journal of Affective Disorders. ISSN 0165-0327. 125(1-3), p. 355–360. doi: 10.1016/j.jad.2010.01.006.
• Nes, Ragnhild Bang; Røysamb, Espen; Harris, Jennifer; Czajkowski, Nikolai & Tambs, Kristian (2010). Mates and Marriage Matter: Genetic and Environmental Influences on Subjective Wellbeing Across Marital Status. Twin Research and Human Genetics. ISSN 1832-4274. 13(4), p. 312–321.
• Valle, Ann-Karin; Røysamb, Espen & Sundby, Johanne (2009). Parental social position, body image, and other psychosocial determinants and first sexual intercourse among 15- and 16-year olds. Adolescence. ISSN 0001-8449. 44(174), p. 479–498.
• Edvardsen, Jack; Torgersen, Svenn; Røysamb, Espen; Lygren, Sissel; Skre, Ingunn & Onstad, Sidsel [Show all 10 contributors for this article] (2009). Unipolar depressive disorders have a common genotype. Journal of Affective Disorders. ISSN 0165-0327. 117(1-2), p. 30–41. doi: 10.1016/j.jad.2008.12.004.
• Karevold, Evalill Bølstad; Røysamb, Espen; Ystrøm, Eivind & Mathiesen, Kristin Schjelderup (2009). Predictors and pathways from infancy to symptoms of anxiety and depression in early adolescence. Developmental Psychology. ISSN 0012-1649. 45(4), p. 1051–1060. doi: 10.1037/a0016123.
• Valle, Ann-Karin; Røysamb, Espen; Sundby, Johanne & Klepp, Knut Inge (2009). Parental social position, body image, and other psychological determinants and first sexual intercourse among 15-and 16-year olds. Adolescence. ISSN 0001-8449. 44(174), p. 479–498.
• Tambs, Kristian; Czajkowski, Nikolai; Røysamb, Espen; Neale, Michael C; Reichborn-Kjennerud, Ted & Aggen, Steven H [Show all 9 contributors for this article] (2009). Structure of genetic and environmental risk factors for dimensional representations of DSM-IV anxiety disorders. British Journal of Psychiatry. ISSN 0007-1250. 195(4), p. 301–307. doi: 10.1192/bjp.bp.108.059485.
• Aggen, SH; Neale, MC; Røysamb, Espen; Reichborn-Kjennerud, Ted & Kendler, KS (2009). A psychometric evaluation of the DSM-IV borderline personality disorder criteria: age and sex moderation of criterion functioning. Psychological Medicine. ISSN 0033-2917. 39(12), p. 1967–1978. doi: 10.1017/S0033291709005807.
• Edvardsen, Jack; Torgersen, Svenn; Røysamb, Espen; Lygren, Sissel; Skre, Ingunn & Onstad, Sidsel [Show all 7 contributors for this article] (2008). Heritability of bipolar spectrum disorders. Unity or heterogeneity? Journal of Affective Disorders. ISSN 0165-0327. 106(3), p. 229–240. doi: 10.1016/j.jad.2007.07.001.
• Czajkowski, Nikolai; Kendler, Kenneth S; Jacobson, Kristen C; Tambs, Kristian; Røysamb, Espen & Reichborn-Kjennerud, Ted (2008). Passive-aggressive (negativistic) personality disorder: A population-based twin study. Journal of Personality Disorders. ISSN 0885-579X. 22(1), p. 109–122.
• Nes, Ragnhild Bang; Czajkowski, Nikolai; Røysamb, Espen; Reichborn-Kjennerud, Ted & Tambs, Kristian (2008). Well-being and ill-being: shared environments, shared genes? Journal of Positive Psychology. ISSN 1743-9760. 3(4), p. 253–265. doi: 10.1080/17439760802399323.
• Kendler, Kenneth S; Aggen, Steven H; Czajkowski, Nikolai; Røysamb, Espen; Tambs, Kristian & Torgersen, Svenn [Show all 8 contributors for this article] (2008). The structure of genetic and environmental risk factors for DSM-IV personality disorders: a multivariate twin study. Archives of General Psychiatry. ISSN 0003-990X. 65(12), p. 1438–1446.
• Søgaard, Anne-Johanne; Dalgard, OS; Holme, Ingar; Røysamb, Espen & Håheim, Lise Lund (2008). Associations between type A behaviour pattern and psychological distress. Social Psychiatry and Psychiatric Epidemiology. ISSN 0933-7954. 43, p. 216–223.
• Nes, Ragnhild B; Røysamb, Espen; Reichborn-Kjennerud, Ted; Harris, Jennifer R. & Tambs, Kristian (2008). Well-being and ill-being: shared environments, shared genes? Journal of Positive Psychology. ISSN 1743-9760. 3, p. 253–265.
• Torgersen, S; Czajkowski, Nikolai; Jacobson, K; Reichborn-Kjennerud, Ted; Røysamb, Espen & Neale, MC [Show all 7 contributors for this article] (2008). Dimensional representations of DSM-IV cluster B personality disorders in a population-based sample of Norwegian twins: a multivariate study. Psychological Medicine. ISSN 0033-2917. 38(11), p. 1617–1625. doi: 10.1017/S0033291708002924.
• Reichborn-Kjennerud, Ted; Czajkowski, Nikolai; Neale, Michael C.; Ørstavik, Ragnhild Elise; Torgersen, Svenn & Tambs, Kristian [Show all 9 contributors for this article] (2007). Genetic and environmental influences on dimensional representations of DSM-IV cluster C personality disorders: a population-based multivariate twin study. Psychological Medicine. ISSN 0033-2917. 37(5), p. 645–653. doi: 10.1017/S0033291706009548.
• Nes, Ragnhild Bang; Røysamb, Espen; Reichborn-Kjennerud, Ted; Harris, Jennifer & Tambs, Kristian (2007). Symptoms of anxiety and depression in young adults: genetic and environmental influences on stability and change. Twin Research and Human Genetics. ISSN 1832-4274. 10(3), p. 450–461. doi: 10.1375/twin.10.3.450.
• Oppedal, Brit & Røysamb, Espen (2007). Young Muslim immigrants in Norway: An epidemiological study of their psychosocial adaptation and internalizing problems. Applied Developmental Science. ISSN 1088-8691. 11(3), p. 112–125. doi: 10.1080/10888690701454583.
• Størksen, Ingunn; Røysamb, Espen; Gjessing, Håkon K; Moum, Torbjørn & Tambs, Kristian (2007). Marriages and psychological distress among adult offspring of divorce: A Norwegian study. Scandinavian Journal of Psychology. ISSN 0036-5564. 48(6), p. 467–476. doi: 10.1111/j.1467-9450.2007.00601.x.
• Røysamb, Espen (2006). Personality and well-being. In Vollrath, Margarete E. (Eds.), Handbook of Personality and Health. John Wiley & Sons. ISSN 978-0-470-02135-4. p. 115–134.
• Røysamb, Espen (2006). Personality and well-being. In Vollrath, Margarete E. (Eds.), Handbook of personality and health. John Wiley & Sons. ISSN 978-0-470-02134-7. p. 115–134.

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• Røysamb, Espen (2013). Bli lykkeligere. Enkle øvelser for et bedre liv. Kagge. ISBN 9788248913511. 150 p.

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• Nygaard, Egil; Ystrøm, Eivind; Nes, Ragnhild Bang; Røysamb, Espen; Klomsten, Anne Torhild & Bjørnebekk, Gunnar [Show all 7 contributors for this article] (2021). Effekt av det tverrfaglige temaet Folkehelse og livsmestring.
• Nygaard, Egil; Nes, Ragnhild Bang; Ystrøm, Eivind; Klomsten, Anne Torhild; Bjørnebekk, Gunnar & Folstad, Siri Hausland [Show all 7 contributors for this article] (2021). Evaluering av implementering av det tverrfaglige temaet «Folkehelse og livsmestring» i norske skoler.
• Røysamb, Espen (2019). From thoughts to numbers. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 139(11).
• Gjerde, Line C.; Eilertsen, Espen Moen; Hannigan, Laurie; Eley, T.C.; Røysamb, Espen & Reichborn-Kjennerud, Ted [Show all 9 contributors for this article] (2019). To what extent can passive genetic transmission account for associations between maternal depressive symptoms and child early life psychopathology symptoms? Behavior Genetics. ISSN 0001-8244. 49(6), p. 520–520. doi: 10.1007/s10519-019-09973-8.
• Seglem, Karoline Brobakke; Torvik, Fartein Ask; Røysamb, Espen; Gjerde, Line C.; Magnus, Per & Reichborn-Kjennerud, Ted [Show all 9 contributors for this article] (2019). Education, lifestyle and life course differences in Level of work incapacity - genes and environment.
• Seglem, Karoline Brobakke; Torvik, Fartein Ask; Ørstavik, Ragnhild; Røysamb, Espen & Vollrath, Margarete E. (2019). Education and lifestyle differences in level of sickness absence - A prospective twin cohort study .
• Eftedal, Nikolai Haahjem; Kleppestø, Thomas Haarklau; Røysamb, Espen; Vassend, Olav; Ystrøm, Eivind & Thomsen, Lotte (2019). Moral opportunism: A unique genetic grounding associates lesser guilt from perpetrating injustice with greater sensitivity to being the victim of it.
• Kleppestø, Thomas Haarklau; Czajkowski, Nikolai Olavi; Vassend, Olav; Røysamb, Espen; Eftedal, Nikolai Haahjem & Kunst, Jonas R. [Show all 8 contributors for this article] (2019). Social dominance orientation has both genetic and unique environmental influences, but only genetic pleiotropy accounts for its correlation with political attitudes.
• Myklestad, Ingri & Røysamb, Espen (2019). Personality, Family and School influence on Adolescence Subjective Well-being: Results from the Nord-Trøndelag Health Study (HUNT). Scandinavian Journal of Public Health. ISSN 1403-4948. 47(Oktober).
• Gjerde, Line C.; Eilertsen, Espen Moen; Hannigan, Laurie; Eley, T.C.; Røysamb, Espen & Reichborn-Kjennerud, Ted [Show all 9 contributors for this article] (2019). To what extent can passive genetic transmission account for associations between maternal depressive symptoms and child early life psychopathology symptoms?
• Wilhelmsen, Tiril; Alexandersen, Nina; Røysamb, Espen; Brandlistuen, Ragnhild Eek & Wang, Mari Vaage (2019). Teachers' competence moderates the association between teacher-child closeness and child behaviour.
• Myklestad, Ingri & Røysamb, Espen (2019). Personality, Family, and School influence on Adolescence Subjective Well-being: Results from the Nord-Trøndelag Health Study (HUNT).
• Røysamb, Espen & Nes, Ragnhild Bang (2019). The role of genetics in subjective well-being. Nature Human Behaviour. ISSN 2397-3374. 3(1). doi: 10.1038/s41562-018-0494-1.
• Myklestad, Ingri & Røysamb, Espen (2018). Personality, family and school influence on subjective well-being among adolescents: Results from the HUNT study.
• Gjerde, Line C.; Eilertsen, Espen Moen; Rosenström, Tom Henrik; Reichborn-Kjennerud, Ted; Røysamb, Espen & McAdams, Tom A. [Show all 8 contributors for this article] (2018). The Joint Structure of Psychopathology and Personality in Preadolescent Children – Preliminary Findings .
• Hansen, Thomas; Nes, Ragnhild Bang; Barstad, Anders Skøien; Røysamb, Espen & Vittersø, Joar (2018). A strategy for creating good (better) lives in Norway.
• Nes, Ragnhild Bang & Røysamb, Espen (2017). The Heritability and Changeability of Happiness.
• Nes, Ragnhild Bang; Røysamb, Espen; Hansen, Thomas; Vittersø, Joar & Barstad, Anders Skøien (2017). A Strategy for Monitoring Quality of Life in Norway.
• H. Kleppestø, Thomas; Czajkowski, Nikolai Olavi; Vassend, Olav; Røysamb, Espen; R. Kunst, Jonas & Thomsen, Lotte (2017). Preferring domination or egalitarianism: Genetic and environmental structure of Social Dominance Orientation.
• Czajkowski, Nikolai Olavi; Bang Nes, Ragnhild; Vassend, Olav & Røysamb, Espen (2017). Effects of somatic and mental illness on subjective well-being. A discordant twin analysis.
• Røysamb, Espen; Bang Nes, Ragnhild; Czajkowski, Nikolai Olavi & Vassend, Olav (2017). Anxiety, depression and life satisfaction after midlife. A twin study across 20 years.
• Bang Nes, Ragnhild; Czajkowski, Nikolai Olavi; Røysamb, Espen & Vassend, Olav (2017). Components and sources of well-being and ill-being: A twin study.
• Vassend, Olav; Nielsen, Christopher Sivert; Røysamb, Espen & Czajkowski, Nikolai Olavi (2017). Fatigue symptoms in relation to neuroticism, anxiety-depression, and musculoskeletal pain. A longitudinal study.
• Lund, Ingunn Olea; Eilertsen, Espen Moen; Gjerde, Line C.; Røysamb, Espen; Wood, Mollie & Reichborn-Kjennerud, Ted [Show all 7 contributors for this article] (2017). Prenatal Exposure to Alcohol and Child Internalizing and Externalizing Problems.
• Dyrdal, Gunvor Marie; Røysamb, Espen; Nes, Ragnhild Bang & Vittersø, Joar (2016). Life stressors and life satisfaction: Short- and long-term individual and societal effects.
• Aakvaag, Helene Flood; Thoresen, Siri; Wentzel-Larsen, Tore; Dyb, Grete; Røysamb, Espen & Olff, Miranda (2016). Broken since it happened. A population study of trauma-related shame after violence and sexual abuse.
• Aakvaag, Helene Flood; Thoresen, Siri; Wentzel-Larsen, Tore; Dyb, Grete; Røysamb, Espen & Olff, Miranda (2016). Broken and guilty since it happened. A population study of trauma-related shame and guilt after violence and sexual abuse.
• Løvoll, Helga Synnevåg; Vittersø, Joar & Røysamb, Espen (2016). The Power of experiences. Momentary experience of intrinsic motivation analyzed With Experience Fluctuation Model and Flow-Simplex.
• Løvoll, Helga Synnevåg; Røysamb, Espen & Vittersø, Joar (2016). Positive følelser fasiliterer indremotivasjon.
• Hermansen, Tone Kristine; Yrttiaho, Santeri; Leppänen, J.-M.; Røysamb, Espen & Melinder, Annika Maria D (2015). The depth of conflict: ERP amplitude at N2 is associated with variation in reaction time in a perceptual interference task.
• Myklestad, Ingri & Røysamb, Espen (2015). Risiko- og beskyttelsesfaktorer blant ungdom. .
• Nes, Ragnhild Bang & Røysamb, Espen (2015). The heritability of subjective well-being: Review and meta-analysis. In Pluess, Michael (Eds.), Genetics of Psychological Well-Being. Oxford University Press. ISSN 978-0-19-968667-4. p. 75–96.
• Gjerde, Line C.; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ystrøm, Eivind; Tambs, Kristian & Aggen, Steven H. [Show all 10 contributors for this article] (2015). Avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood. Show summary

  Backgroundand Aims: The stability over time for avoidant personality disorder (AVPD) and obsessive-compulsive personality disorder (OCPD) has previously been found to be moderate. However, the mechanisms underlying this temporal development are not well understood. In the present study we estimate the influence of genetic and environmental factors on stability and change in AVPD and OCPD. Methods: AVPD and OCPD traits were assessed using the Structured Interview for DSM-IV Personality in 2,793 young adult twins from the Norwegian Institute of Public Health Twin Panel (wave 1). On average 10 years later (wave 2) 2,282 of these were re-interviewed. Longitudinal biometric models were fitted to dimensional representations of AVPD and OCPD. Results: The number of endorsed sub-threshold criteria for both PDs decreased 31% from wave 1 to wave 2. The correlations between the numbers of traits endorsed at the two time points were 0.54 for AVPD and 0.37 for OCPD. Genetic factors contributed 67% and 53%, respectively, to the stability of AVPD and OCPD. The correlations between the genetic factors influencing AVPD and OCPD at the two time points were 1.00 and 0.72 respectively, while the environmental influences correlated 0.26 and 0.23, respectively. The correlation between the stable risk factors for AVPD and OCPD was 0.39 of which 63% was attributable to genetic influences. Conclusion: Both AVPD and OCPD were moderately stable from young to middle adulthood. Stability was in large part due to genetic factors, whereas environmental influences contributed to change.

• Reichborn-Kjennerud, Ted; Czajkowski, Nikolai Olavi; Ystrøm, Eivind; Ørstavik, Ragnhild; Aggen, Steven H. & Tambs, Kristian [Show all 12 contributors for this article] (2015). Borderline and antisocial personality disorder traits in early to middle adulthood: A longitudinal twin study. Show summary

  Background and Aims: Antisocial personality disorder (ASPD) and borderline personality disorder (BPD) share genetic and environmental risk factors. Little is known about the temporal stability of these etiological factors in adulthood. Methods: DSM-IV criteria for ASPD and BPD were assessed using structured interviews in 2,282 Norwegian twins in early adulthood and approximately 10 years later. Longitudinal biometric models were used to analyze the number of endorsed criteria. Results: The mean criterion count for ASPD and BPD decreased 40% and 28% respectively from early to middle adulthood. Rank-order stability was 0.58 for ASPD and 0.45 for BPD. The best-fitting longitudinal twin model included only genetic and individual-specific environmental factors. Genetic effects, both those shared by ASPD and BPD, and those specific to each disorder remained completely stable. The unique environmental effects, however, changed substantially, with a correlation across time of 0.19 for the shared effects, and 0.39 and 0.15 respectively for those specific to ASPD and BPD. Genetic effects accounted for 71% and 72% of the stability over time for ASPD and BPD respectively. The genetic and environmental correlations between ASPD and BPD were 0.73, and 0.43 respectively at both time points. Conclusion: ASPD and BPD traits were moderately stable from early to middle adulthood, mostly due to genetic risk factors which did not change over the10 year assessment period. Environmental risk factors were mostly transient, and appear to be the main source of phenotypic change. Genetic liability factors were, to a large extent, shared by ASPD and BPD.

• Gjerde, Line C.; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ystrøm, Eivind; Tambs, Kristian & Aggen, Steven H. [Show all 10 contributors for this article] (2015). Avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood.
• Myklestad, Ingri & Røysamb, Espen (2014). Risiko- og beskyttelsesfaktorer for psykisk helse blant ungdom. .
• Valle, Ann-Karin; Røysamb, Espen & Klepp, Knut Inge (2014). Positive Emotions, Sexual Self-Concepts and Contraceptive use among adolescent girls in Norway.
• Gjerde, Line C.; Røysamb, Espen; Czajkowski, Nikolai Olavi; Knudsen, Gun Peggy; Østby, Kristian Amundsen & Tambs, Kristian [Show all 9 contributors for this article] (2013). Personality disorders and long-term sick leave - Preliminary results from a population-based study of young adult Norwegian twins.
• Valle, Ann-Karin & Røysamb, Espen (2013). Subjective Experience of quality of sexual relationships, teenage pregnancy and sexual health promotion among adolescents.
• Aakvaag, Helene Flood; Thoresen, Siri; Wentzel-Larsen, Tore; Røysamb, Espen & Dyb, Grete (2013). Shame and Guilt in the aftermath of terror: The Utøya Island Study.
• Aakvaag, Helene Flood; Thoresen, Siri; Wentzel-Larsen, Tore; Røysamb, Espen & Dyb, Grete (2013). Shame in the aftermath of terror: The Utøya Island Study.
• Knudsen, Gun Peggy; Tambs, Kristian; Hettema, Jack; Ørstavik, Ragnhild; Røysamb, Espen & Czajkowski, Nikolai [Show all 8 contributors for this article] (2012). The influence of personality disorders on longitudinal stability of anxiety. Behavior Genetics. ISSN 0001-8244. 42(6), p. 944–944. doi: 10.1007/s10519-012-9566-6.
• Valle, Ann Karin; Røysamb, Espen & Klepp, Knut-Inge (2012). Social determinants, body image and sexual health among 15 and 16-year olds.
• Nes, Ragnhild Bang; Hauge, Lars Johan; Røysamb, Espen; Kornstad, Tom; Landolt, Markus & Irgens, Lorentz M. [Show all 9 contributors for this article] (2012). Maternal Well-Being and Psychological Distress: A Prospective Longitudinal Study of Mothers Giving Birth to Children With Congenital Anomalies.
• Nilsen, Wendy; Gustavson, Kristin Brun; Røysamb, Espen; Kjeldsen, Anne & Karevold, Evalill Bølstad (2012). A prospective examination of gender-specific pathways from maternal distress and childhood problem behaviors to adolescent depressive symptoms(Poster presentation).
• Gjerde, Line C.; Knudsen, Gun Peggy; Czajkowski, Nikolai Olavi; Aggen, Steven H.; Røysamb, Espen & Reichborn-Kjennerud, Ted [Show all 10 contributors for this article] (2012). Genetic and environmental contributions to long-term sick leave and disability pension - A population-based study of young adult Norwegian twins.
• Nilsen, Wendy; Karevold, Evalill Bølstad; Røysamb, Espen; Gustavson, Kristin Brun & Mathiesen, Kristin Schjelderup (2011). Prospective associations between social competence and adolescent depressive symptoms (Oral presentation).
• Ørstavik, Ragnhild; Czajkowski, Nikolai Olavi; Knudsen, Gun Peggy; Røysamb, Espen; Tambs, Kristian & Reichborn-Kjennerud, Ted (2011). Possible sex differences in genetic and environmental influences on measures of socioeconomic status-results from a Norwegian study of young adult twins. Behavior Genetics. ISSN 0001-8244. 41(6), p. 929–929.
• Myklestad, Ingri & Røysamb, Espen (2011). Risk and protective factors for psychological distress: A family study in the Nord-Trøndelag Health Study.
• Myklestad, Ingri & Røysamb, Espen (2011). The prospective relationship between psychological distress and academic problems: a longitudinal study of adolescents.
• Gjerde, Line C.; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ørstavik, Ragnhild; Østby, Kristian Amundsen & Knudsen, Gun Peggy [Show all 8 contributors for this article] (2011). The heritability of liability to Cluster C personality disorders. Preliminary results from Axis I and Axis II Psychiatric Disorders in Norwegian Twins .
• Nilsen, Wendy; Karevold, Evalill Bølstad; Røysamb, Espen & Mathiesen, Kristin Schjelderup (2010). Maternal symptoms of distress in toddlerhood and later adolescent depressive symptoms.
• Nilsen, Wendy; Karevold, Evalill Bølstad; Røysamb, Espen & Mathiesen, Kristin Schjelderup (2010). Do social skills moderate the relation between early maternal distress and adolescent depressive symptoms.
• Valle, Ann Karin & Røysamb, Espen (2010). Sosial ulikhet, kroppsbilde og seksuell helse blant ungdom - gamle myter eller nye innsikter.
• Nilsen, Wendy; Karevold, Evalill Bølstad; Røysamb, Espen & Mathiesen, Kristin Schjelderup (2009). Predicting depression symptoms in adolescence – Examining the effects of cumulative maternal distress, current strains and temperament [POSTER PRESENTATION].
• Reichborn-Kjennerud, Ted; Czajkowski, Nikolai; Røysamb, Espen; Ørstavik, Ragnhild Elise; Torgersen, Svenn & Kendler, Kenneth S (2009). Major Depression and DSM-IV Personality Disorders: A Population-Based Twin Study.
• Alves, Daniele Evelin; Zachrisson, Henrik Daae; Oppedal, Brit & Røysamb, Espen (2009). Absence in gender differences in internalizing symptoms among ethnic minority preadolescents.
• Røysamb, Espen & Vittersø, Joar (2008). Subjective well-being: How do genes and environment contribute to stability and change.
• Oppedal, Brit & Røysamb, Espen (2008). Association between parents’ achievement values and mental health among immigrant and non immigrant youth in Norway.
• Ørstavik, Ragnhild Elise; Kendler, KS; Røysamb, Espen; Tambs, Kristian; Czajkovski, N & Reichborn-Kjennerud, Ted (2007). The relationship between borderline, avoidant and depressive personality disorder: A multivariate twin study. Behavior Genetics. ISSN 0001-8244. 37.
• Tambs, Kristian; Czajkowski, N; Reichborn-Kjennerud, Ted; Aggen, SH; Ørstavik, Ragnhild Elise & Neale, MC [Show all 9 contributors for this article] (2007). Evidence of familial effects common to panic disorder, generalized anxiety disorder, and phobias and common and disorder specific effects of non-shared environment. Behavior Genetics. ISSN 0001-8244. 37.
• Røysamb, Espen (2006). The Science of Well-being (Edited by F. Huppert N. Baylis and B. Keverne.) Oxford University Press. Psychological Medicine. ISSN 0033-2917. 36.
• Brekke, Idunn; Skjønsberg, Eia Elena; Smith, Otto Robert Frans; Røsand, Gun-Mette Brandsnes; Holt, Tonje & Aarø, Leif Edvard [Show all 10 contributors for this article] (2021). Effektevaluering av International Child Development Programme (ICDP) - En randomisert kontrollert studie. Folkehelseinstituttet. ISSN 978-82-8406-209-9.
• Nes, Ragnhild Bang; Nilsen, Thomas Sevenius; Hauge, Lars Johan; Eilertsen, Maja; Gustavson, Kristin & Aarø, Leif Edvard [Show all 7 contributors for this article] (2020). Fra nord til sør: Livskvalitet i Norge 2019. Folkehelseinstituttet, Område for Psykisk og fysisk helse. ISSN 978-82-8406-113-9. Full text in Research Archive
• Barstad, Anders Skøien; Normann, Tor Morten; Nes, Ragnhild Bang; Reneflot, Anne; Røysamb, Espen & Hougen, Hanne Cecilie [Show all 9 contributors for this article] (2016). Gode liv i Norge: Utredning om måling av befolkningens livskvalitet. Helsedirektoratet, Rapport nr. IS-2479. Show summary

  Livskvalitet handler om det som gir livet verdi og mening. For noen er det mest mulig frihet, for andre glede, eller utvikling av evner og interesser. Fordi livskvalitetsbegrepet reiser spørsmålet om hva som er verdifullt i seg selv, berører det politikkens kjerne: å legge til rette for at samfunnsborgerne kan leve gode liv. Hovedformålet med dette prosjektet er å bidra til at vi får bedre informasjon om hvordan mennesker i Norge har det - med hovedvekt på befolkningens egne vurderinger og opplevelser. Blir livet bedre for alle, eller er det noen som får det verre? Det foreliggende notatet gjennomgår hva som finnes av data og reiser sentrale spørsmål: Bør det gjennomføres en egen livskvalitetsundersøkelse i Norge? Hvordan kan vi få god informasjon på kommunalt nivå? Hvordan kan vi på best måte bruke livskvalitetsdata?

• Idstad, Mariann; Tambs, Kristian & Røysamb, Espen (2014). Mental distress in couples: subjective caregiver burden and divorce in the general population. Universitetet i Oslo. ISSN 1504-3991.
• Gjerde, Line Cecilie; Ørstavik, Ragnhild; Røysamb, Espen & Knudsen, Gun Peggy (2014). Genetic and environmental contributions to personality disorders, long-term sick leave and disability pension. Universitetet i Oslo. ISSN 1504-3991.
• Tambs, Kristian; Røysamb, Espen & Rognmo, Kamilla (2013). Consequences of alcohol use for family members: a population based study. Universitetet i Oslo. ISSN 1504-3991.
• Torvik, Fartein Ask; Tambs, Kristian & Røysamb, Espen (2012). Familial consequences of alcohol use in the general population. University of Oslo.
• Karevold, Evalill Bølstad; Røysamb, Espen & Mathiesen, Kristin Schjelderup (2008). Emotional problems in childhood and adolescence : predictors, pathways and underlying structure. Unipub forlag. ISSN 1504-3991.
• Nes, Ragnhild Bang & Røysamb, Espen (2007). Well-being & psychological distress : genetic and environmental influences on stability, change, and covariance. Unipub forlag. ISSN 1504-3991.

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