Luis Eduardo Munoz

• Muñoz, Luis Eduardo; Kartushina, Natalia & Mayor, Julien (2024). Sustained pacifier use is associated with smaller vocabulary sizes at 1 and 2 years of age: A cross-sectional study. Developmental Science. ISSN 1363-755X. doi: 10.1111/desc.13477. Fulltekst i vitenarkiv Vis sammendrag

  Pacifier use during childhood has been hypothesized to interfere with language processing, but, to date, there is limited evidence revealing detrimental effects of prolonged pacifier use on infant vocabulary learning. In the present study, parents of 12- and 24-month-old infants were recruited in Oslo (Norway). The sample included 1187 monolingual full-term born (without visual, auditory, or cognitive impairments) infants: 452 (230 girls; 222 boys) 12-month-olds and 735 (345 girls; 390 boys) 24-month-olds. Parents filled out an online Norwegian Communicative Development Inventory (CDI), which assesses the vocabulary in comprehension and production for 12-month-old infants and in production only for 24-month-old infants. CDI scores were transformed into age- and sex-adjusted percentiles using Norwegian norms. Additionally, parents retrospectively reported their child's daytime pacifier use, in hours, at 2-month intervals, from birth to the assessment date. Maternal education was used to control, in the analyses, for the socio-economic status. We found that greater pacifier use in an infant's lifespan was associated with lower vocabulary size. Pacifier use later in life was more negatively associated with vocabulary size than precocious use, and increased the odds of being a low language scorer. In sum, our study moves beyond the findings of momentary effects of experimentally induced “impairment” in articulators’ movement on speech perception and suggests that, from 12 months of age, constraints on the infant's speech articulators (pacifier use) may be negatively associated with word comprehension and production.

• Ye, Qun; Fidalgo, Celia; Byrne, Patrick; Munoz, Luis Eduardo; Cant, Jonathan S. & Lee, Andy C.H. (2024). Using imagination and the contents of memory to create new scene and object representations: A functional MRI study. Neuropsychologia. ISSN 0028-3932. doi: 10.1016/j.neuropsychologia.2024.109000. Fulltekst i vitenarkiv
• Soderstrom, Melanie; Rocha-Hidalgo, Joscelin; Munoz, Luis Eduardo; Bochynska, Agata; Werker, Janet F. & Skarabela, Barbora [Vis alle 42 forfattere av denne artikkelen] (2024). Testing the relationship between preferences for infant-directed speech and vocabulary development: A multi-lab study. Journal of Child Language. ISSN 0305-0009. doi: 10.1017/S0305000924000254. Fulltekst i vitenarkiv Vis sammendrag

  From early on, infants show a preference for infant-directed speech (IDS) over adult-directed speech (ADS), and exposure to IDS has been correlated with language outcome measures such as vocabulary. The present multi-laboratory study explores this issue by investigating whether there is a link between early preference for IDS and later vocabulary size. Infants’ preference for IDS was tested as part of the ManyBabies 1 project, and follow-up CDI data were collected from a subsample of this dataset at 18 and 24 months. A total of 341 (18 months) and 327 (24 months) infants were tested across 21 laboratories. In neither preregistered analyses with North American and UK English, nor exploratory analyses with a larger sample did we find evidence for a relation between IDS preference and later vocabulary. We discuss implications of this finding in light of recent work suggesting that IDS preference measured in the laboratory has low test-retest reliability.

• Kartushina, Natalia; Mani, Nivedita; Aslı, Aktan-Erciyes; Alaslani, Khadeejah; Aldrich, Naomi J. & Almohammadi, Alaa [Vis alle 52 forfattere av denne artikkelen] (2022). COVID-19 first lockdown as a window into language acquisition: associations between caregiver-child activities and vocabulary gains. Language Development Research. 2, s. 1–36. doi: 10.34842/abym-xv34. Fulltekst i vitenarkiv Vis sammendrag

  The COVID-19 pandemic, and the resulting closure of daycare centers worldwide, led to unprecedented changes in children’s learning environments. This period of increased time at home with caregivers, with limited access to external sources (e.g., daycares) provides a unique opportunity to examine the associations between the caregiver-child activities and children’s language development. The vocabularies of 1742 children aged8-36 months across 13 countries and 12 languages were evaluated at the beginning and end of the first lockdown period in their respective countries(from March to September 2020). Children who had less passive screen exposure and whose caregivers read more to them showed larger gains in vocabulary development during lockdown, after controlling for SES and other caregiver-child activities. Children also gained more words than expected (based on normative data) during lockdown; either caregivers were more aware of their child’s development or vocabulary development benefited from intense caregiver-child interaction during lockdown.

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• Kartushina, Natalia; Mayor, Julien; White, Michelle Jennifer; Gundersen, Anni Sofie Myrtveit; Onnis, Luca & Hagelund, Silje [Vis alle 9 forfattere av denne artikkelen] (2025). Reliability of acoustic measures of infant-directed speech between lab and home environments and play and reading contexts. Fulltekst i vitenarkiv
• Munoz, Luis Eduardo; Rosslund, Audun; Kartushina, Natalia & Mayor, Julien (2024). Pacifier use is associated with reduced word comprehension in early childhood. Fulltekst i vitenarkiv
• Munoz, Luis Eduardo; Rosslund, Audun; Kartushina, Natalia & Mayor, Julien (2024). No evidence of native sound discrimination in Norwegian 9-month-old infants using an eye-tracking habituation paradigm. Fulltekst i vitenarkiv
• Munoz, Luis Eduardo; Rosslund, Audun; Mayor, Julien & Kartushina, Natalia (2023). No evidence of native sound discrimination in Norwegian 9-month-old infants using an eye-tracking habituation paradigm. Fulltekst i vitenarkiv
• Munoz, Luis Eduardo; Kartushina, Natalia; Martin, Clara & Baart, Martijn (2022). Investigating the impact of production training of non-native speech sounds on perception performance using the MMN. Fulltekst i vitenarkiv
• Muñoz, Luis Eduardo; Kartushina, Natalia & Mayor, Julien (2022). Sustained Pacifier Use is Associated with Smaller Vocabulary sizes at 1 and 2 Years of Age. Fulltekst i vitenarkiv
• Munoz, Luis Eduardo; Kartushina, Natalia & Mayor, Julien (2022). Season-of-Birth Effects on Infant Vocabulary Size. Fulltekst i vitenarkiv
• Munoz, Luis Eduardo; Kartushina, Natalia & Mayor, Julien (2022). Season-of-birth effects on infant vocabulary size. Fulltekst i vitenarkiv
• Munoz, Luis Eduardo; Kartushina, Natalia & Mayor, Julien (2022). Sustained Pacifier Use is Associated with Smaller Vocabulary Sizes at 1 and 2 Years of Age. Fulltekst i vitenarkiv
• Kartushina, Natalia; Robberstad, Silje; Munoz, Luis Eduardo & Mayor, Julien (2021). Acoustic properties of Norwegian infant-directed speech and their role in language development of 8-9-month-old infants. Fulltekst i vitenarkiv

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