期刊
PSYCHOLOGICAL SCIENCE
卷 25, 期 9, 页码 1816-1821出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/0956797614535401
关键词
fear conditioning; category-based induction; generalization; skin conductance responses; reasoning
资金
- National Institute of Mental Health Training Award in Systems and Integrative Neuroscience Grant [T32-MH019524]
- National Science Foundation Grant [BCS 1128769]
- Division Of Behavioral and Cognitive Sci
- Direct For Social, Behav & Economic Scie [1128769] Funding Source: National Science Foundation
The ability to represent knowledge at the category level promotes the transfer of learning. How this ability integrates with basic forms of conditioned learning is unknown but could explain why conditioned fear is overgeneralized after aversive experiences. We examined the impact of stimulus typicality-an important determinant of category-based induction-on fear learning and generalization. Typicality is known to affect the strength of categorical arguments; a premise involving typical exemplars (e. g., sparrow) is believed to apply to other members, whereas a premise about atypical exemplars (e. g., penguin) generalizes more narrowly to similar items. We adopted this framework to human fear conditioning and found that fear conditioned to typical exemplars generalized more readily to atypical members than vice versa, despite equal feature overlap across conditions. These findings have implications for understanding why some fearful events lead to broad overgeneralization of fear whereas others are regarded as isolated episodes.
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