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What do Two-Year-Olds Understand about Hidden-Object Events?
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Mash, Clay; Novak, Elizabeth; Berthier, Neil E.; Keen, Rachel – Developmental Psychology, 2006
Preferential-looking studies suggest that by 2 months of age, infants may have knowledge about some object properties, such as solidity. Manual search studies of toddlers examining these same concepts, however, have failed to provide evidence for the same understanding. Investigators have recently attempted to reconcile this disparity but failed…
Descriptors: Toddlers, Developmental Psychology, Reaction Time, Psychological Evaluation
Object Permanence After a 24-Hr Delay and Leaving the Locale of Disappearance: The Role of Memory, Space, and Identity
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Moore, M. Keith; Meltzoff, Andrew N. – Developmental Psychology, 2004
Fourteen-month-old infants saw an object hidden inside a container and were removed from the disappearance locale for 24 hr. Upon their return, they searched correctly for the hidden object, demonstrating object permanence and long-term memory. Control infants who saw no disappearance did not search. In Experiment 2, infants returned to see the…
Descriptors: Object Permanence, Long Term Memory, Infants, Infant Behavior
Development of Self-Recognition in the Infant
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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
Infants' Perception of Object Unity in Translating and Rotating Displays.
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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
The Question of Decalage Between Object Permanence and Person Permanence
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And Others; Jackson, Elaine – Developmental Psychology, 1978
Presents a study of decalage between object permanence and person permanence. Decalage was influenced by environmental as well as stimulus factors with infants tested between 6- and 81/4-months/of-age. (BD)
Descriptors: Cognitive Development, Developmental Stages, Environmental Influences, Infant Behavior
The Onset of Representation and Entry into Stage 6 of Object Permanence Development
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Campos, Joseph J.; Ramsay, Douglas S. – Developmental Psychology, 1978
Attempts to determine whether infants' performance in two search tasks is related to their entry into Stage 6 of object permanence development (thereby testing Piaget's claim that only Stage 6 infants possess the capacity for representation). (BD)
Descriptors: Cognitive Development, Cognitive Processes, Developmental Stages, Infant Behavior
Why Do Infants Make A Not B Errors in a Search Task, Yet Show Memory for the Location of Hidden Objects in a Nonsearch Task?
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Ahmed, Ayesha; Ruffman, Ted – Developmental Psychology, 1998
Four experiments examined 8- to 12-month olds on search and nonsearch A not B tasks, a one-location task, and control tasks. Results indicated memory for where object was hidden and expectations of where it should be found. The effect occurred at delays at which infants made the A not B error when searching, and at a longer 15-second delay.…
Descriptors: Cognitive Development, Cognitive Processes, Error Patterns, Expectation