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And Others; Moore, M. Keith – Journal of Experimental Child Psychology, 1978
Descriptors: Age Differences, Conservation (Concept), Developmental Stages, Infant Behavior
Lingle, Kathleen M.; Lingle, John H. – 1978
A study was conducted to investigate the degree to which both object familiarity and motivational factors influence infants' search behavior in an object permanence test. Infants' search behavior for an unfamiliar test object was compared with search behavior for (a) an experientially familiar object that each infant had played with daily for a…
Descriptors: Age Differences, Attachment Behavior, Examiners, Infant Behavior
Peer reviewed Peer reviewed
Bertenthal, Bennett I.; Fischer, Kurt W. – Developmental Psychology, 1978
Presents a study of the development of self-recognition in infants from 6 to 24 months of age. The development of self-recognition is compared to the development of object permanence. (BD)
Descriptors: Age Differences, Cognitive Development, Developmental Stages, Infant Behavior
Peer reviewed Peer reviewed
Eizenman, Dara R.; Bertenthal, Bennett I. – Developmental Psychology, 1998
Three experiments examined 4- and 6-month-olds' sensitivity to the unity of a partly occluded moving rod undergoing translation, rotation, or oscillation. Findings suggested that all types of common motion were not equivalent for specifying infants' perceptions of occluded objects. (Author)
Descriptors: Age Differences, Comparative Analysis, Infant Behavior, Infants
Peer reviewed Peer reviewed
And Others; Kramer, Judith A. – Child Development, 1975
An investigation of Piaget's theory of object concept development through a series of six tasks administered in a combined longitudinal/cross-sectional design (which incorporated a number of methodological controls). Subjects were 36 infants who received the six tasks during each of three testing sessions over a 6-month period. (Author/ED)
Descriptors: Age Differences, Cognitive Development, Cross Sectional Studies, Developmental Tasks
Shimada, Shoko; And Others – 1979
The purpose of this study was to cross-sectionally and longitudinally examine the developmental process of search behavior in infancy. Subjects were 23 Japanese normal infants (11 males and 12 females) who were individually tested once a month from the age of six to 13 months in laboratory settings. Small toys and three white opaque cubic boxes…
Descriptors: Age Differences, Cognitive Development, Cross Sectional Studies, Developmental Stages