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Direct linkRuffman, Ted; Slade, Lance; Carlos Sandino, Juan; Fletcher, Amanda – Child Development, 2005
Eight- to 12-month-olds might make A-not-B errors, knowing the object is in B but searching at A because of ancillary (attention, inhibitory, or motor memory) deficits, or they might genuinely believe the object is in A (conceptual deficit). This study examined how diligently infants searched for a hidden object they never found. An object was…
Descriptors: Infants, Object Permanence, Inhibition, Error Patterns
Peer reviewedDiedrich, Frederick J.; Highlands, Tonia M.; Spahr, Kimberly A.; Thelen, Esther; Smith, Linda B. – Journal of Experimental Child Psychology, 2001
Evaluated in three experiments a dynamic systems theory account of perseverative errors on "A-not-B" task. Found that 9-month-olds perseverated when reaching for identical targets, but made nonperseverative responses when reaching in the presence of a highly distinctive B target. Reach direction was jointly determined by target's…
Descriptors: Cognitive Development, Cues, Error Patterns, Infant Behavior
Peer reviewedAhmed, 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
