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Origins of these associations are unclear, but common genetic background may play an important role. Participants included 405 twin pairs (mean age of 54\u2009years; 59% female) from the National Survey of Midlife Development in the United States (MIDUS) who reported on their personality traits (broad and specific), as well as sleep disturbances (problems with falling asleep, staying asleep, waking early, and feeling unrested). Uni\u2010 and bivariate biometric decompositions evaluated contributions of genetic and environmental factors to associations between personality and poor sleep, as well as unique contributions from individual traits. Neuroticism, extraversion, conscientiousness, and aggressiveness were the strongest phenotypic predictors of poor sleep. Genetic sources of covariance were about twice as large as non\u2010shared environmental sources, and only shared genetic background accounted for links between aggressiveness and poor sleep. Neuroticism and extraversion accounted for most of the genetic overlap between personality and sleep disturbances. The findings shed light on developmental antecedents of ties between personality and poor sleep, suggesting a larger role of common genetic background than idiosyncratic life experiences. The results also suggest that emotion\u2010related traits play the most important role for poor sleep, compared to other personality traits, and may partially account for genetic associations with other traits.<\/jats:p>","DOI":"10.1111\/jsr.13903","type":"journal-article","created":{"date-parts":[[2023,4,13]],"date-time":"2023-04-13T11:56:57Z","timestamp":1681387017000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Linking genetic foundations of sleep disturbances to personality traits: a study of <scp>mid\u2010life<\/scp> twins"],"prefix":"10.1111","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0406-0847","authenticated-orcid":false,"given":"Zlatan","family":"Krizan","sequence":"first","affiliation":[{"name":"Department of Psychology Iowa State University  Ames Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Colin","family":"Freilich","sequence":"additional","affiliation":[{"name":"University of Minnesota  Minneapolis Minnesota USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert F.","family":"Krueger","sequence":"additional","affiliation":[{"name":"University of Minnesota  Minneapolis Minnesota USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank D.","family":"Mann","sequence":"additional","affiliation":[{"name":"Stony Brook University  Minneapolis Minnesota USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,4,13]]},"reference":[{"key":"e_1_2_14_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.sleep.2010.09.009"},{"key":"e_1_2_14_3_1","unstructured":"Boker S. 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