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Related Experiment Video

Updated: Apr 27, 2026

Using the Threat Probability Task to Assess Anxiety and Fear During Uncertain and Certain Threat
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Stimulus typicality determines how broadly fear is generalized.

Joseph E Dunsmoor1, Gregory L Murphy2

  • 1New York University joseph.dunsmoor@nyu.edu.

Psychological Science
|July 13, 2014
PubMed
Summary
This summary is machine-generated.

Fear learning generalizes differently based on stimulus typicality. Typical examples lead to broader fear generalization than atypical ones, impacting how we understand fear overgeneralization.

Keywords:
category-based inductionfear conditioninggeneralizationreasoningskin conductance responses

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Behavioral Science

Background:

  • Category-level knowledge representation aids learning transfer.
  • The integration of category-based learning with conditioned fear is not well understood.
  • Overgeneralization of conditioned fear after aversive experiences may stem from category-level processing.

Purpose of the Study:

  • To investigate the influence of stimulus typicality on human fear conditioning and generalization.
  • To explore how category-based induction principles apply to fear learning.
  • To understand the mechanisms behind differential fear overgeneralization.

Main Methods:

  • Human participants underwent fear conditioning paradigms.
  • Stimuli varied in typicality (e.g., sparrow vs. penguin).
  • Fear generalization was assessed across typical and atypical exemplars with controlled feature overlap.

Main Results:

  • Fear conditioned to typical exemplars generalized more to atypical exemplars than vice versa.
  • This differential generalization occurred despite equivalent feature overlap between stimuli.
  • Stimulus typicality significantly modulated the extent of fear generalization.

Conclusions:

  • Stimulus typicality is a critical factor in fear generalization, mirroring category-based induction.
  • The findings provide insight into why some aversive events lead to broad fear overgeneralization.
  • Understanding typicality effects can inform therapeutic strategies for anxiety disorders involving fear generalization.