{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T04:14:27Z","timestamp":1790741667858,"version":"4.1.0"},"reference-count":42,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2023,9,27]],"date-time":"2023-09-27T00:00:00Z","timestamp":1695772800000},"content-version":"vor","delay-in-days":269,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["2017229"],"award-info":[{"award-number":["2017229"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["2017229"],"award-info":[{"award-number":["2017229"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,9,27]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Positive emotions play a critical role in guiding human behavior and social interactions. This study examined whether and how genetic variability in the oxytocin system is linked to individual differences in expressing positive affect in human infants. Our results show that genetic variation in CD38 (rs3796863), previously linked to increased release of oxytocin, was associated with higher rates of positive affective displays among a sample of 7-month-old infants, using established parent-report measures. Moreover, infants displaying increased levels of positive affect (smiling and laughter) also showed enhanced brain responses in the right inferior frontal cortex, a brain region previously linked to perception\u2013action coupling, when viewing others smile at them. These findings suggest that, from early in development, genetic variation in the oxytocin system is associated with individual differences in expressed positive affect, which in turn are linked to differences in perceiving positive affect. This helps uncover the neurobiological processes accounting for variability in the expression and perception of positive affect in infancy.<\/jats:p>","DOI":"10.1093\/scan\/nsad049","type":"journal-article","created":{"date-parts":[[2023,9,27]],"date-time":"2023-09-27T23:36:27Z","timestamp":1695857787000},"source":"Crossref","is-referenced-by-count":6,"title":["Variability in\u00a0the expression and\u00a0perception of\u00a0positive affect in\u00a0human infancy"],"prefix":"10.1093","volume":"18","author":[{"given":"Tobias","family":"Grossmann","sequence":"first","affiliation":[{"name":"Department of Psychology, University of Virginia , Charlottesville, VA 22903, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adrienne","family":"Wood","sequence":"additional","affiliation":[{"name":"Department of Psychology, University of Virginia , Charlottesville, VA 22903, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2023,9,12]]},"reference":[{"issue":"9","key":"2023092723340143300_R1","doi-asserted-by":"crossref","first-page":"837","DOI":"10.1002\/bies.20623","article-title":"CD38 regulates oxytocin secretion and\u00a0complex social behavior","volume":"29","author":"Bartz","year":"2007","journal-title":"Bioessays"},{"issue":"1528","key":"2023092723340143300_R2","doi-asserted-by":"crossref","first-page":"2391","DOI":"10.1098\/rstb.2009.0058","article-title":"Evidence for\u00a0mirror systems in\u00a0emotions","volume":"364","author":"Bastiaansen","year":"2009","journal-title":"Philosophical Transactions of the Royal Society of London. 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