Dag-Erik Eilertsen

• Nordmo, Magnus; Sønderland, Nils Martin; Havik, Odd E.; Eilertsen, Dag-Erik; Monsen, Jon Trygve & Solbakken, Ole Andre (2020). Effectiveness of open-ended psychotherapy under clinically representative conditions. Frontiers in Psychiatry.  ISSN 1664-0640.  11:384, s 1- 13 . doi: 10.3389/fpsyt.2020.00384 Full text in Research Archive.
• Tonga, Johanne Bjørnstad; Eilertsen, Dag-Erik; Solem, Ingrid Konstanse Ledel; Arnevik, Espen Kristian Ajo; Korsnes, Maria Stylianou & Ulstein, Ingun (2020). Effect of Self-Efficacy on Quality of Life in People With Mild Cognitive Impairment and Mild Dementia: The Mediating Roles of Depression and Anxiety. American Journal of Alzheimers Disease & Other Dementias.  ISSN 1533-3175. . doi: 10.1177/1533317519885264
• Bang, Henning; Boe, Ole; Eilertsen, Dag-Erik & Nilsen, Fredrik A. (2018). OBSCIF – A RELIABLE AND VALID OBSERVATIONAL INSTRUMENT FOR MEASURING CHARACTER STRENGTHS. ICERI proceedings.  ISSN 2340-1095.  s 5465- 5473 . doi: 10.21125/iceri.2018.2268
• Bang, Henning; Boe, Ole; Nilsen, Fredrik A. & Eilertsen, Dag-Erik (2017). Do character strengths predict how well military cadets succeed during their Bachelor`s program?. ICERI proceedings.  ISSN 2340-1095.  s 7297- 7302 . doi: 10.21125/iceri.2017.1961 Show summary

  The Norwegian Military Academy (NMA) aims at educating and developing highly skilled military officers through its Bachelor programs. Prior studies have indicated that twelve character strengths are particularly important for succeeding as a military officer. How important are these character strengths for how the military cadets perform academically and physically during the Bachelor’s programs at the NMA? The purpose of this study is to examine to what extent the twelve character strengths predict how well cadets succeed during their Bachelor programs, and if character strengths outperform mental intelligence as predictor of cadet performance. The cadets’ character strengths were measured with an observational instrument (OBSCIF) filled out by peer cadets at the end of a combat fatigue exercise. The cadets’ performance was measured by physical tests and grades from different courses of the Bachelor programs. Mental intelligence was measured as a general ability score, based on a combined measure of the performance on three tests: Arithmetic, Word Similarities and Figures. Analyses included partial correlations between the twelve character strengths and cadet performance indicators, controlling for mental intelligence. Ten out of twelve character strengths – Bravery, Love of learning, Leadership, Integrity, Perspective, Creativity, Self-regulation, Persistence, Open-mindedness, and Teamwork – correlated moderately to strongly with how the cadets performed either academically or physically, even when controlling for intelligence. The character strengths Fairness and Social intelligence did not correlate significantly with any of the performance criteria. Character strengths seem to be important predictors for how well cadets succeed during their Bachelor’s programs, and they outperform mental intelligence as predictors of cadet performance. Military education programs should consider selecting cadets characterized by certain character strengths, and aim at further developing these character strengths during the education. Character strengths seem to be important predictors for how well cadets succeed during their Bachelor’s programs, and they outperform mental intelligence as predictors of cadet performance. Military education programs should consider selecting cadets characterized by certain character strengths, and aim at further developing these character strengths during the education. The cadets’ character strengths were measured with an observational instrument (OBSCIF) filled out by peer cadets at the end of a combat fatigue exercise. The cadets’ performance was measured by physical tests and grades from different courses of the Bachelor programs. Mental intelligence was measured as a general ability score, based on a combined measure of the performance on three tests: Arithmetic, Word Similarities and Figures. Analyses included partial correlations between the twelve character strengths and cadet performance indicators, controlling for mental intelligence. Ten out of twelve character strengths – Bravery, Love of learning, Leadership, Integrity, Perspective, Creativity, Self-regulation, Persistence, Open-mindedness, and Teamwork – correlated moderately to strongly with how the cadets performed either academically or physically, even when controlling for intelligence. The character strengths Fairness and Social intelligence did not correlate significantly with any of the performance criteria. Character strengths seem to be important predictors for how well military cadets succeed during their Bachelor’s programs, and they outperform mental intelligence as predictors of cadet performance. Military education programs should consider selecting cadets characterized by certain character strengths, and aim at further developing these character strengths during the education.

• Magnussen, Svein; Eilertsen, Dag-Erik; Stridbeck, Ulf; Teigen, Karl Halvor & Wessel, Ellen Margrethe (2017). Misforstått kritikk. Tidsskrift for Rettsvitenskap.  ISSN 0040-7143.  130, s 109- 111 . doi: 10.18261/issn.1504-3096-2017-01-06
• Bang, Henning; Eilertsen, Dag-Erik; Boe, Ole & Nilsen, Fredrik A. (2016). Development of an observational instrument (OBSCIF) for evaluating character strengths in army cadets. EDULEARN proceedings.  ISSN 2340-1117.  s 7803- 7808 . doi: 10.21125/edulearn.2016.0711 Show summary

  Problem statement: The Norwegian Military Academy (NMA) aims to educate highly competent officers, who have the capacity to lead under extreme conditions. Previous studies have identified 12 particularly important character strengths for succeeding as an officer in the Norwegian army. These are leadership, integrity, persistence, bravery, teamwork, fairness, open-mindedness, social intelligence, love of learning, perspective, self-regulation, and creativity. The NMA wants to observe, evaluate and develop these character strengths during the army cadets’ three-year bachelor’s program. However, a previous study has found that VIA-IS – a survey based questionnaire designed to measure character strengths – poorly predicts what character strengths army cadets actually display during extreme conditions, such as a long and stressful military field exercise. Hence, there is a need for a reliable and valid measure of character strengths displayed under extreme conditions. Purpose of study: To develop a reliable and valid observational instrument for measuring 12 character strengths displayed by army cadets under extreme conditions, such as stressful military field exercises. Method: An observational instrument (OBSCIF – OBServation of Character In Field) was developed and tested on 59 army cadets. The cadets evaluated themselves on VIA-IS and OBSCIF. Consistency between scoring on the two instruments, and scale reliabilities for OBSCIF, were examined. Conclusion: Scores on the 12 character strengths measured by VIA-IS and OBSCIF correlates substantially with each other, indicating that OBSCIF is a valid measure of the 12 character strengths. In addition, reliability coefficients (Cronbach’s alphas) estimated for the 12 scales in OBSCIF are all within acceptable levels, indicating that they provide reliable measures of the 12 character strengths. OBSCIF exists in Norwegian and English, and is available for use by any educational institution who is interested in evaluating character strengths displayed during live settings.

• Magnussen, Svein; Eilertsen, Dag-Erik; Teigen, Karl Halvor; Stridbeck, Ulf & Wessel, Ellen Margrethe (2016). Urimelig tvil: et tilsvar. Tidsskrift for Rettsvitenskap.  ISSN 0040-7143.  129, s 300- 305
• Wessel, Ellen Margrethe; Eilertsen, Dag-Erik; Langnes, Espen; Magnussen, Svein & Melinder, Annika Maria D (2016). Disclosure of child sexual abuse: expressed emotions and credibility judgments of a child mock victim. Psychology, Crime and Law.  ISSN 1068-316X.  22(4), s 331- 343 . doi: 10.1080/1068316X.2015.1109087
• Bang, Henning; Boe, Ole; Nilsen, Fredrik Andre & Eilertsen, Dag-Erik (2015). Evaluating character strengths in cadets during a military field exercise: Consistency between different evaluation sources. EDULEARN proceedings.  ISSN 2340-1117.  s 7076- 7082 . doi: 10.21125/iceri.2016.0374 Show summary

  Problem statement: The Norwegian Military Academy (NMA) educates cadets who will serve as officers in international military operations. Serving as an officer in such operations is often demanding, and requires that the officer exhibit certain personal strengths and characteristics. Applying assumptions and formulations based on Peterson and Seligman’s (2004) taxonomy of 24 character strengths, prior studies have identified 12 character strengths that are particularly relevant and important for succeeding as an officer in the Norwegian army. The character strengths are: leadership, integrity, persistence, bravery, citizenship, fairness, open-mindedness, social intelligence, love of learning, perspective, self-regulation, and creativity. The NMA have launched a project to find ways of observing, evaluating and developing these character strengths during the cadets’ three-year bachelor’s program. Since no instruments for observing and evaluating character strengths in live contexts exist today, the NMA developed an observer-based instrument for evaluation of character strengths in military field exercises. Purpose of study: To examine the consistency in evaluations across raters when using an observer-based instrument designed to measure 12 vital character strengths in cadets during military field exercises. Method: 60 cadets from the NMA attending a 5-day military field exercise were evaluated on 12 character strengths by three different sources: themselves, peer cadets and supervisors. Evaluations from the different sources were compared, and consistency across sources for each of the 12 character strengths, were examined. Conclusion: 7 of 12 character strengths (leadership, persistence, citizenship, social intelligence, love of learning, perspective, and self-regulation) showed significant and positive correlations between two or three of the evaluation sources. Peers and supervisors were more consistent in their evaluations of the cadets compared to peers/self-evaluation and supervisor/self-evaluation.

• Magnussen, Svein; Eilertsen, Dag-Erik; Stridbeck, Ulf; Teigen, Karl Halvor & Wessel, Ellen Margrethe (2014). «UTOVER RIMELIG TVIL»? En kvantitativ studie av sikkerhet i bevisvurdering i straffesaker hos norske fagdommere og lekdommere. Tidsskrift for Rettsvitenskap.  ISSN 0040-7143.  127, s 384- 396
• Magnussen, Svein; Eilertsen, Dag-Erik; Teigen, Karl Halvor & Wessel, Ellen Margrethe (2014). The Probability of Guilt in Criminal Cases: Are People Aware of Being 'Beyond Reasonable Doubt'?. Applied Cognitive Psychology.  ISSN 0888-4080.  28(2), s 196- 203 . doi: 10.1002/acp.2978
• Ommundsen, Reidar; Veer, Kees van der; Larsen, Knud S. & Eilertsen, Dag-Erik (2014). Framing Unauthorized Immigrants: The Effects of Labels on Evaluations. Psychological Reports.  ISSN 0033-2941.  114(2), s 461- 478 . doi: 10.2466/17.PR0.114k20w0
• Johansen, Venke Agnes; Eilertsen, Dag-Erik; Nordanger, Dag Øystein & Weisæth, Lars (2013). Prevalence, comorbidity and stability of post-traumatic stress disorder and anxiety and depression symptoms after exposure to physical assault: An 8-year prospective longitudinal study. Nordic Journal of Psychiatry.  ISSN 0803-9488.  67(1), s 69- 80 . doi: 10.3109/08039488.2012.732112
• Fiore, Felicia; Cornoldi, Cesare; De Beni, Rossana; D'Urso, Valentina; Eilertsen, Dag-Erik & Magnussen, Svein (2012). Short-term memory for flavour. Journal of Cognitive Psychology.  ISSN 2044-5911.  24(2), s 134- 139 . doi: 10.1080/20445911.2011.598854
• Wessel, Ellen Margrethe; Bollingmo, Guri Cecilie; Sønsteby, Carine; Eilertsen, Dag-Erik; Nielsen, Linda Marie & Magnussen, Svein (2012). The emotional witness effect: story content, emotional valence and credibility of a male suspect. Psychology, Crime and Law.  ISSN 1068-316X.  18(5), s 417- 430 . doi: 10.1080/1068316X.2010.502119
• Phelps, Joshua Marvle; Eilertsen, Dag-Erik; Türken, Salman & Ommundsen, Reidar (2011). Integrating immigrant minorities: Developing a scale to measure majority members' attitudes toward their own proactive efforts. Scandinavian Journal of Psychology.  ISSN 0036-5564.  52(4), s 404- 410 . doi: 10.1111/j.1467-9450.2011.00876.x Show summary

  The present study is based on the premise that the integration of ethnic minorities may involve more than the majority’s expression of tolerance. In order to promote inclusion, the majority may have to play a more active role in the integration process. We describe the development and validation of a new psychometric scale which assesses majority members’ attitudes toward their own proactive contribution to the integration of immigrants within three domains: cultural and structural efforts, and openness to diversity. The scale is investigated by analyses of internal structure and exploration of construct validity in relation to relevant social psychological and personality constructs in a sample of 486 Norwegian university students (28% male, mean age = 26.5, SD = 6.08). Factor analyses supported a unidimensional structure and the estimated reliability of an additive scale was satisfactory (Cronbach’s α = 0.91). The scale correlated negatively with measures of right-wing authoritarianism and social dominance orientation, and positively with global identity. It was weakly related to the personality traits agreeableness, intellect, extraversion, and conscientiousness. The potential utility of the scale in both applied and experimental social psychological studies are discussed.

• Arntzen, Erik; Løkke, Jon Arne; Løkke, Gunn & Eilertsen, Dag-Erik (2010). On misconceptions about behavior analysis among university students and teachers. The Psychological Record.  ISSN 0033-2933.  60(2), s 325- 336 Show summary

  Students frequently show misconceptions regarding scientific psychology in general and basic concepts in behavior analysis in particular. We wanted to replicate the study by Lamal (1995) and to expand the study by including some additional statements. In the current study, the focus was on misconceptions about behavior analysis held by undergraduates, by students in a master program in behavior analysis, by teachers in university colleges, and by a group of students without any formal training in psychology. The results showed that participants in all groups showed misconceptions. Students in the master program held the fewest misconceptions, while traditional psychology students showed most misconceptions about behavior analysis. Factors that might influence number and resistance of misconceptions are discussed.

• Bakken, Trine Lise; Helverschou, Sissel Berge; Eilertsen, Dag-Erik; Heggelundq, Trond; Myrbakk, Even & Martinsen, Harald (2010). Psychiatric disorders in adolescents and adults with autism and intellectual disability: A representative study in one county in Norway. Research in Developmental Disabilities.  ISSN 0891-4222.  31(6), s 1669- 1677 . doi: 10.1016/j.ridd.2010.04.009
• Bang, Henning; Fuglesang, Synne Løvdahl; Ovesen, Mariann Reinås & Eilertsen, Dag-Erik (2010). Effectiveness in top management group meetings: The role of goal clarity, focused communication, and learning behavior. Scandinavian Journal of Psychology.  ISSN 0036-5564.  51(3), s 253- 261 . doi: 10.1111/j.1467-9450.2009.00769.x
• Fjell, Anders Martin; Amlien, Inge; Westlye, Lars Tjelta; Stenset, Vidar; Fladby, Tormod; Skinningsrud, Anders; Eilertsen, Dag-Erik; Bjørnerud, Atle & Walhovd, Kristine B (2010). CSF biomarker pathology correlates with a medial temporo-parietal network affected by very mild to moderate Alzheimer's disease but not a fronto-striatal network affected by healthy aging. NeuroImage.  ISSN 1053-8119.  49(2), s 1820- 1830 . doi: 10.1016/j.neuroimage.2009.09.029
• Lippe, Anna Louise von der; Eilertsen, Dag-Erik; Hartmann, Ellen Johanne & Killén, Kari (2010). The role of maternal attachment in children's attachment and cognitive executive functioning: A preliminary study. Attachment & Human Development.  ISSN 1461-6734.  12(5), s 429- 444 . doi: 10.1080/14616734.2010.501967
• Bollingmo, Guri Cecilie; Wessel, Ellen Margarethe; Sandvold, Yvonne; Eilertsen, Dag-Erik & Magnussen, Svein (2009). The effect of biased and non-biased information on judgments of witness credibility. Psychology, Crime and Law.  ISSN 1068-316X.  15(1), s 61- 71 . doi: 10.1080/10683160802131107
• Bakken, Trine Lise; Eilertsen, Dag-Erik; Smeby, Nina Aarhus & Martinsen, Harald (2008). Effective communication related to psychotic disorganised behaviour in adults with intellectual disability and autism. Vård i Norden.  ISSN 0107-4083.  28(2 = 88), s 9- 13
• Bollingmo, Guri Cecilie; Wessel, Ellen Margarethe; Eilertsen, Dag-Erik & Magnussen, Svein (2008). Credibility of the emotional witness: A study of ratings by police investigators. Psychology, Crime and Law.  ISSN 1068-316X.  14(1), s 29-40 . doi: 10.1080/10683160701368412
• Lippe, Anna Louise von der; Monsen, Jon Trygve; Rønnestad, Michael Helge & Eilertsen, Dag-Erik (2008). Treatment failure in psychotherapy: The pull of hostility. Psychotherapy Research.  ISSN 1050-3307.  18(4), s 420- 432 . doi: 10.1080/10503300701810793
• Dahl, Janne; Enemo, Ida; Bollingmo, Guri Cecilie; Wessel, Ellen Margarethe; Eilertsen, Dag-Erik & Magnussen, Svein (2007). Displayed emotions and witness credibility: A comparison of judgments by individuals and mock juries. Applied Cognitive Psychology.  ISSN 0888-4080.  21, s 1145- 1155
• Johansen, VA; Wahl, Astrid Klopstad; Eilertsen, Dag-Erik & Weisaeth, L (2007). Prevalence and predictors of post-traumatic stress disorder (PTSD) in physically injured victims of non-domestic violence - A longitudinal study. Social Psychiatry and Psychiatric Epidemiology.  ISSN 0933-7954.  42, s 583- 593 . doi: 10.1007/s00127-007-0205-0
• Johansen, Venke Agnes; Wahl, Astrid; Eilertsen, Dag E.; Weisaeth, L; Weisæth, Lars; Hanestad, BR & Hanestad, Berit Rokne (2007). The predictive value of post-traumatic stress disorder symptoms for quality of life: a longitudinal study of physically injured victims of non-domestic violence. Health and Quality of Life Outcomes.  ISSN 1477-7525.  5 . doi: 10.1186/1477-7525-5-26
• Monsen, Jon T.; von der Lippe, Anna Louise; Lippe, Anna Louise von der; Havik, Odd E.; Halvorsen, Margrethe S. & Eilertsen, Dag E. (2007). Validation of the SASB introject surface in a Norwegian clinical and nonclinical sample. Journal of Personality Assessment.  ISSN 0022-3891.  88(2), s 235- 245
• Johansen, Venke Agnes; Wahl, Astrid; Eilertsen, Dag E.; Hanestad, Berit Rokne & Weisaeth, Lars (2006). Acute psychological reactions in assault victims of non-domestic violence: Peritraumatic dissociation, post-traumatic stress disorder, anxiety and depression. Nordic Journal of Psychiatry.  ISSN 0803-9488.  60, s 452- 462
• Monsen, Jon T.; Hagtvet, Knut Arne; Havik, Odd E. & Eilertsen, Dag E. (2006). Circumplex structure and personality disorder correlates of the interpersonal problems model (IIP-C): Construct validity and clinical implications. Psychological Assessment.  ISSN 1040-3590.  18(2) . doi: 10.1037/1040-3590.18.2.165
• Monsen, Jon Trygve; Hagtvet, Knut Arne; Havik, Odd E. & Eilertsen, Dag-Erik (2006). Circumplex Structure and Personality Disorders Correlates of the Interpersonal Problems Model (IIP-C): Construct validity and clinical implications. Psychological Assessment.  ISSN 1040-3590.  18(2), s 165- 173 . doi: 10.1037/1040-3590.18.2.165 Show summary

  This study assessed the construct validity of the circumplex model of the Inventory of Interpersonal Problems (IIP-C) in Norwegian clinical and non-clinical samples. Structure was examined by evaluating the fit of the circumplex model to data obtained by the IIP-C. Observer-rated personality disorder criteria (DSM-IV, axis II) were used as external correlates. The reliability of the IIP-C scales were acceptable and in the same range as in the original version. A multi-sample analysis strategy did not support an invariant circumplex model across the two groups. However, the estimated structures reflected mostly the same circular pattern of a quasi-circumplex model in the two groups. Departures from the ideal model were of negligible practical significance. The validity results examining personality disorder correlates of the IIP-C generally conformed to predictions, providing direct evidence for agreement between self-report and expert judgments of interpersonal problems.

• Wessel, Ellen Margarethe; Drevland, Guri Cecilie Bollingmo; Eilertsen, Dag-Erik & Magnussen, Svein J (2006). Credibility of the emotional witness: A study of ratings by court judges. Law and Human Behavior.  ISSN 0147-7307.  30, s 221-230
• Walhovd, Kristine B.; Fjell, Anders M.; Reinvang, Ivar; Lundervold, Arvid; Dale, Anders M.; Eilertsen, Dag E.; Quinn, B. T.; Salat, David; Makris, Nikos & Fischl, Bruce (2005). Effects of age on volumes of cortex, white matter and subcortical structures. Neurobiology of Aging.  ISSN 0197-4580.  26(9), s 1261- 1270 Show summary

  doi: 10.1016/j.neurobiolaging.2005.05.020

• Walhovd, Kristine B; Walhovd, Kristine B; Fjell, Anders Martin; Fjell, Anders Martin; Reinvang, Ivar; Lundervold, Arvid; Dale, Anders m; Eilertsen, Dag-Erik; Quinn, Brian t; Salat, David; Makris, Nikos & Fischl, Bruce (2005). Effects of age on volumes of cortex, white matter and subcortical structures. Neurobiology of Aging.  ISSN 0197-4580.  26(9), s 1261- 1270 Show summary

  Abstract The effect of age was investigated in, and compared across, 16 automatically segmented brain measures: cortical gray matter, cerebral white matter, hippocampus, amygdala, thalamus, the accumbens area, caudate, putamen, pallidum, pons, cerebellar cortex, cerebellar white matter, the lateral ventricle, the inferior lateral ventricle, and the 3rd and 4th ventricle. Significant age effects were found for all volumes except pallidum and the 4th ventricle. Heterogeneous age responses were seen in that age relationships for cortex, amygdala, thalamus, the accumbens area, and caudate were linear, while cerebral white matter, hippocampus, pons, cerebellar white and gray matter, as well as volume of the lateral, inferior lateral, and 3rd ventricles showed curvilinear relationships with age. In general, the findings point to global and large effects of age across brain volumes.

• Meyer, Anneke; Eilertsen, Dag-Erik; Sundet, Jon Martin; Tshifularo, Johannes & Sagvolden, Terje (2004). Cross-cultural similarities in ADHD-like behaviour amongst South African primary school children. South African Journal of Psychology.  ISSN 0081-2463.  34(1), s 123- 139
• Melinder, Annika Maria D; Goodman, Gail S.; Eilertsen, Dag-Erik & Magnussen, Svein J (2004). Beliefs about child witnesses: A survey of professionals. Psychology, Crime and Law.  ISSN 1068-316X.  10, s 347- 365
• Ihlebæk, Cecilie; Løve, Tonja; Eilertsen, Dag-Erik & Magnussen, Svein J (2003). Memory for a staged criminal event witnessed live and on video. Memory.  ISSN 0965-8211.  11, s 219- 227
• Martinsen, Harald; Helverschou, Sissel Berge; Kalvenes, Gro; Bjella, Harald; Eknes, Jarle; Bakken, Trine-Lise & Eilertsen, Dag-Erik (2003). Psykiske lidelser hos voksne mennesker med autisme og psykisk utviklingshemming. Prosjektprofil. Autismenettverket (Oslo).  ISSN 1502-4016.  (2) Show summary

  Autismenettverket består av en faglig enhet - Autismeenheten - og knutepunkter som har spisskompetanse innen feltet. Den faglige enheten er lagt til Institutt for spesialpedagogikk. Autismeenheten har ansvar for forskning, undervisning og utvikling av tjenestetilbud til mennesker med autisme og skal bistå med kompetanseutvikling og koordinering av knutepunktfunksjonene i Autismenettverket.

• Monsen, Jon Trygve; Eilertsen, Dag-Erik; Melgård, Trond & Ødegård, Pål (1996). Affects and affect consciousness: Initial experiences from the assessment of affect integration. The Journal of Psychotherapy Practice and Research.  5, s 238- 249
• Gjone, Helene; Stevenson, Jim; Sundet, Jon Martin & Eilertsen, Dag-Erik (1996). Changes in heritability across increasing levels of behavior problems in young twins. Behavior Genetics.  ISSN 0001-8244.  26(4), s 419- 425
• Kvalem, Ingela Lundin; Sundet, Jon Martin; Rivø, Kate I.; Eilertsen, Dag-Erik & Bakketeig, Leif S. (1996). The Effect of Sex Education on Adolescent's Use of Condoms: Applying the Solomon Four-Group Design. Health education quarterly.  ISSN 0195-8402.  23(1), s 34- 47 Show summary

  A school-based sex education program was developed in order to prevent sexually transmitted diseases and unwanted pregnancies. A Solomon Four-group design, with random assignment to the different conditions, was used to evaluate an intervention based on cognitive social learning theory and social influence theory. The main goal of the intervention was to increase use of condoms. A stratified sample of 124 classes (2411 students) was drawn at random from all the upper secondary schools (high-schools/colleges) in one county in Norway. The results indicate a consistent interaction between pretest and intervention, which seem to have an effect on condom use. Pretest or intervention alone did not contribute to this effect. The interaction effect appeared among the students with few sexual partners. Several possible explanations to the observed interaction effect and the implication for future interventions are discussed.

• Monsen, Jon Trygve; Odland, Torleiv; Faugli, Anne; Daae, Elisabeth & Eilertsen, Dag-Erik (1995). Personality disorders and psychosocial changes after intensive psychotherapy: A prospective follow-up study of an outpatient psychotherapy project, 5 years after end of treatment. Scandinavian Journal of Psychology.  ISSN 0036-5564.  36, s 256- 268
• Monsen, Jon Trygve; Odland, Torleiv; Faugli, Anne; Daae, Elisabeth & Eilertsen, Dag-Erik (1995). Personality disorders: Changes and stability after intensive psychotherapy focussing on affect consciousness. Psychotherapy Research.  ISSN 1050-3307.  5(1), s 33- 48

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• Bang, Henning; Eilertsen, Dag-Erik; Boe, Ole & Nilsen, Fredrik A. (2019). Measuring character strengths: Are self-ratings or other-ratings best?.
• Bang, Henning; Boe, Ole; Eilertsen, Dag-Erik & Nilsen, Fredrik A. (2018). OBSCIF - A reliable and valid observational instrument for measuring character strenghts.
• Bang, Henning; Eilertsen, Dag-Erik; Boe, Ole; Nilsen, Fredrik A. & Lang-Ree, Ole Christian (2018). Character strengths predict academic and military performance.
• Boe, Ole; Bang, Henning; Nilsen, Fredrik A. & Eilertsen, Dag-Erik (2017). Character strengths as important predictors for success in the military.
• Bang, Henning; Eilertsen, Dag-Erik; Boe, Ole & Nilsen, Fredrik A. (2016). OBSCIF: Evaluating Character strengths.
• Johansen, Venke; Eilertsen, Dag-Erik; Nordanger, Dag Øystein & Weisaeth, Lars (2013). Prevalence, comorbidity and stability of post-traumatic stress disorder and anxiety and depression after exposure to physical assault: An 8-year prospective study.
• Phelps, Joshua Marvle; Eilertsen, Dag-Erik; Türken, Salman & Ommundsen, Reidar (2007). Attitude-based promoting and inhibiting factors for integration: A new scale.
• Bentsen, H; Roth, Christine; Eilertsen, Dag-Erik; Harrison, G; Hopper, K & Trygg, Kerstin Ulla (2006). Nutritional and psychosocial predictors of the course of schizophrenia: An international ecological study. Schizophrenia Research.  ISSN 0920-9964.  81
• Monsen, Jon Trygve; Kallerud, Jan Erik & Eilertsen, Dag-Erik (1999). Multisenterdatabasen -brukermanual med illustrasjoner av basen brukt som klinisk informasjonssystem, overføring av data til SPSS, samt data fra norsk referanseutvalg.

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