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Object Permanence in 3 1/2- and 4 1/2-Month-Old Infants.
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Baillargeon, Renee – Developmental Psychology, 1987
Three experiments test object permanenece in 3 1/2- and 4 1/2-month-old infants, and use an impossible-possible-habituation event format. The 4 1/2-month-olds, and the 3 1/2-month-olds who were fast habituators, look reliably longer at the impossible than at the possible event. Results seriously question Piaget's (1954) claims regarding the age at…
Descriptors: Cognitive Ability, Cognitive Development, Cognitive Processes, Habituation
Effects of Subependymal and Mild Intraventricular Lesions on Visual Attention and Memory in Premature Infants.
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Ross, Gail; And Others – Developmental Psychology, 1992
Premature infants with subependymal or intraventricular hemorrhage took longer to habituate on a habituation task, and scored lower on a measure of mental development, than did other premature infants or full-term infants. Both groups of premature infants were less successful than full-term infants on an object permanence task. (BC)
Descriptors: Cognitive Development, Habituation, Memory, Neurological Impairments
Infants' Perception of Auditory Space.
Peer reviewed Peer reviewed
Clifton, Rachel; And Others – Developmental Psychology, 1991
Infants who were in darkness were presented with objects that made sounds. Objects were within reach and out of reach. Infants reached into the target area more often when the object was in reach than when the object was beyond reach. Infants reached correctly in the dark for objects placed off midline. (BC)
Descriptors: Auditory Discrimination, Auditory Perception, Auditory Stimuli, Cognitive Development
Development of Self-Recognition in the Infant
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
The Question of Decalage Between Object Permanence and Person Permanence
Peer reviewed Peer reviewed
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
Peer reviewed Peer reviewed
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
Perception of Object Unity in 2-Month-Old Infants.
Peer reviewed Peer reviewed
Johnson, Scott P.; Aslin, Richard N. – Developmental Psychology, 1995
Examined perception of object unity in partial occlusion in 72 infants. Recorded how long subjects looked at a display of complete and incomplete rods. In test and control conditions, infants looked longer at broken rods than at complete rods, suggesting that infants' cognitive, visual, or attentional skills may be insufficient to support…
Descriptors: Attention, Attention Span, Cognitive Development, Cognitive Processes