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Direct linkDondi, Marco; Messinger, Daniel; Colle, Marta; Tabasso, Alessia; Simion, Francesca; Barba, Beatrice Dalla; Fogel, Alan – Infancy, 2007
To better understand the form and recognizability of neonatal smiling, 32 newborns (14 girls; M = 25.6 hr) were videorecorded in the behavioral states of alertness, drowsiness, active sleep, and quiet sleep. Baby Facial Action Coding System coding of both lip corner raising (simple or non-Duchenne) and lip corner raising with cheek raising…
Descriptors: Eye Movements, Sleep, Neonates, Infant Behavior
