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ERIC Number: EJ830984
Record Type: Journal
Publication Date: 2006-Jan
Pages: 25
Abstractor: As Provided
Reference Count: 48
ISSN: ISSN-1524-8372
The Influence of Number of A Trials on 2-Year-Olds' Behavior in Two A-Not-B-Type Search Tasks: A Test of the Hierarchical Competing Systems Model
Marcovitch, Stuart; Zelazo, Philip David
Journal of Cognition and Development, v7 n4 p477-501 Jan 2006
Age-appropriate modifications of the A-not-B task were used to examine 2-year-olds' search behavior. Several theories predict that A-not-B errors will increase as a function of number of A trials. However, the hierarchical competing systems model (Marcovitch & Zelazo, 1999) predicts that although the ratio of perseverative to nonperseverative errors will increase, the likelihood of perseveration will be an inverted U-shaped function. In Experiment 1, children received 1, 6, or 11 A trials in a multistep multilocation search task. In Experiment 2, children received 3, 7, 11, or 15 A trials in a sandbox task. Results from Experiment 1 showed that the ratio of perseverative to nonperseverative errors increased with number of A trials, and results from both Experiments 1 and 2 indicated that the likelihood of perseverative errors was highest following a moderate number of A trials. These findings are consistent with the suggestion that search behavior provides an index of the development of conscious control. (Contains 4 figures, 2 tables and 4 footnotes.)
Psychology Press. Available from: Taylor & Francis, Ltd. 325 Chestnut Street Suite 800, Philadelphia, PA 19106. Tel: 800-354-1420; Fax: 215-625-2940; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A