Disrupting feedback processing interferes with rule-based but not information-integration category learning |
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Authors: | Email author" target="_blank">W?Todd?MaddoxEmail author F?Gregory?Ashby A?David?Ing Alan?D?Pickering |
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Institution: | University of Texas, Department of Psychology, Austin, Texas 78712, USA. maddox@psy.utexas.edu |
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Abstract: | The effect of a sequentially presented memory scanning task on rule-based and information-integration category learning was investigated. On each trial in the short feedback-processing time condition, memory scanning immediately followed categorization. On each trial in the long feedback-processing time condition, categorization was followed by a 2.5-sec delay and then memory scanning. In the control condition, no memory scanning was required. Rule-based category learning was significantly worse in the short feedback-processing time condition than in the long feedback-processing time condition or control condition, whereas information-integration category learning was equivalent across conditions. In the rule-based condition, a smaller proportion of observers learned the task in the short feedback-processing time condition, and those who learned took longer to reach the performance criterion than did those in the long feedback-processing time or control condition. No differences were observed in the information integration task. These results provide support for a multiple-systems approach to category learning and argue against the validity of single-system approaches. |
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