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Marsh, Heidi L.; Stavropoulos, Jennifer; Nienhuis, Tom; Legerstee, Maria – Infancy, 2010
Behne, Carpenter, Call, and Tomasello (2005) showed that 9- to 18-month-olds, but not 6-month-olds, differentiated between people who were unwilling and unable to share toys. As the outcome of the two tasks is the same (i.e., the toy is not shared), the infants must respond to the different goals of the actor. However, visual habituation paradigms…
Descriptors: Infants, Infant Behavior, Toys, Age Differences
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Brannon, Elizabeth M. – Cognition, 2002
Two experiments examined development of the ordinality concept in infants. Found that 11-month-olds successfully discriminated, whereas 9-month-olds failed to discriminate sequences that descended in numerical value from sequences increasing in numerical value. Nine-month-olds could discriminate the ordinal direction of sequences that varied in…
Descriptors: Age Differences, Cognitive Development, Cross Sectional Studies, Developmental Stages
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Laucht, Manfred; Becker, Katja; Schmidt, Martin H. – Journal of Child Psychology and Psychiatry, 2006
Background: The present study was designed to investigate the association between visual exploratory behaviour in early infancy, novelty seeking in adolescence, and the dopamine D4 receptor (DRD4) genotype. Methods: Visual attention was measured in 232 three-month-old infants (114 males, 118 females) from a prospective longitudinal study using a…
Descriptors: Evidence, Attention, Infants, Males