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Keller, Heidi; Scholmerich, Axel – Developmental Psychology, 1987
Vocalizations of infants were classified and analyzed in a longitudinal sample of infants ranging in age from 2 to 14 weeks. Results suggest that infants performed different types of vocalizations that can be interpreted as affective states from 2 weeks of age on. Parents responded with a highly diversified pattern of reactions to different infant…
Descriptors: Affective Behavior, Classification, Communication Research, Communication Skills