title: Six-month-old infant long sleepers prefer a human face.
abstract: Sleep is known to influence socio-emotional regulation among children and preschoolers, whereas little is known about the association between sleep and social preference during infancy.
  
  
  
  In the current study, habitual sleep of 49 infants aged around six months old were surveyed by questionnaire, and their social preference was revealed by their preferential gaze in three conditions: (1) a human face paired with an object (ie, a cup), (2) a human face paired with an animal face (ie, a dog), and (3) a dog face paired with a cup.
  
  
  
  In general, images with richer social information (ie, a human face and dog) attracted infants' gaze significantly more than nonsocial images (ie, cup). Infants with shorter sleep duration (ie, <13 h a day) show a significant reduction in their preference toward a human face when paired with a dog than infants with longer sleep duration.
  
  
  
  Our findings suggest an early positive link between sleep duration and preference towards socially rich stimuli (eg, a human face) during infancy.
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China; Department of Psychology, The University of Hong Kong, Hong Kong, China.
authors.forename: Wanqi
authors.initials: W
authors.lastname: Sun
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China.
authors.forename: Guanghai
authors.initials: G
authors.lastname: Wang
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China.
authors.forename: Yanrui
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China.
authors.forename: Yuanjin
authors.initials: Y
authors.lastname: Song
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China.
authors.forename: Shumei
authors.initials: S
authors.lastname: Dong
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China.
authors.forename: Qingmin
authors.initials: Q
authors.lastname: Lin
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China.
authors.forename: Yujiao
authors.initials: Y
authors.lastname: Deng
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhu
authors.affiliation: Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China. Electronic address: fanjiang@shsmu.edu.cn.
authors.forename: Fan
authors.initials: F
authors.lastname: Jiang
mesh_terms: D000704:Analysis of Variance; D053483:Eye Movement Measurements; D005133:Eye Movements; D005145:Face; D000066499:Facial Recognition; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012890:Sleep; D012919:Social Behavior; D011795:Surveys and Questionnaires
keywords: Infant; Sleep duration; Social cognition