Prior sleep timing and visual recognition of emotional faces in 6-month-old infants |
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| Institution: | 1. School of Psychology, University of Waikato, New Zealand;2. Faculty of Psychology, Ruhr University Bochum, Germany;3. School of Psychology, University of Wollongong, Australia;4. Department of Educational Sciences and Psychology, TU Dortmund University, Germany;1. Montclair State University, United States;2. The Johns Hopkins University, United States;1. Department of Psychology, Emory University, United States;2. Department of Obstetrics and Gynecology and Psychiatry, Columbia University Irving Medical Center, United States;3. New York State Psychiatric Institute, United States;1. Department of Psychology, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo, 112-8610, Japan;2. Department of Psychology, Lancaster University, Lancaster, LA1 4YF, United Kingdom;3. Division of Human Communication, Development and Hearing, School of Health Sciences, University of Manchester, Coupland 1, Oxford Road, Manchester, M13 9PL, UK;1. Lancaster University, United Kingdom;2. University of Exeter, United Kingdom;3. University of California, Los Angeles, United States;1. Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA;2. Department of Psychology, Williams College, Williams, MA, USA;3. Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA;4. Department of Anatomy and Cell Biology, Columbia University Irving Medical Center, New York, NY, USA;5. Department of Psychiatry, Columbia University Irving Medical Center, New York, NY, USA;6. Children’s Healthcare of Atlanta, Atlanta, GA, USA |
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| Abstract: | Face recognition is an important mnemonic ability for infants when navigating the social world. While age-related changes in face processing abilities are relatively well documented, less is known about short-term intra-individual fluctuations in this ability. Given that sleep deprivation in adults leads to impairments in information processing, we assessed the role of prior sleep on 6-month-old infants’ (N = 17) visual recognition of faces showing three emotional expressions (neutral, sad, angry). Visual recognition was inferred by assessing novelty preferences for unfamiliar relative to familiarized faces in a visual recognition memory paradigm. In a within-subject design, infants participated once after they had recently woken up from a nap (nap condition) and once after they had been awake for an extended period of time (awake condition). Infants failed to show visual recognition for the neutral faces in either condition. Infants showed recognition for the sad and angry faces when tested in the awake condition, but not in the nap condition. This suggests that timing of prior sleep shapes how effectively infants process emotionally relevant information in their environment. |
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| Keywords: | Infants Prior sleep Nap Face processing Visual recognition Emotions |
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