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Related Experiment Videos

Emotion in the criminal psychopath: startle reflex modulation

C J Patrick1, M M Bradley, P J Lang

  • 1Department of Clinical and Health Psychology, University of Florida, Gainesville 32610.

Journal of Abnormal Psychology
|February 1, 1993
PubMed
Summary

Psychopaths exhibit abnormal emotional processing, lacking the typical startle blink response modulation seen in nonpsychopaths and mixed groups when viewing emotional stimuli. This suggests a specific deficit in affective responding.

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Area of Science:

  • Psychology
  • Neuroscience
  • Criminology

Background:

  • Psychopathy is a personality disorder characterized by antisocial behavior and emotional deficits.
  • Understanding emotional processing in psychopaths is crucial for treatment and rehabilitation.

Purpose of the Study:

  • To investigate emotional responding in psychopaths using startle blink reflexes.
  • To determine if psychopathy affects the modulation of startle responses by emotional stimuli.

Main Methods:

  • Fifty-four incarcerated sexual offenders were assessed and divided into nonpsychopathic, psychopathic, and mixed groups.
  • Startle-elicited blinks were measured during the presentation of affective slides.
  • Autonomic and self-report measures were also collected.

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Main Results:

  • Nonpsychopaths and mixed groups showed typical startle modulation, with larger responses to unpleasant slides.
  • Psychopathic individuals lacked this modulation, showing no difference in startle responses across slide types.
  • Group differences in startle modulation were linked to affective traits, not antisocial behavior.

Conclusions:

  • Psychopathy is associated with an abnormality in processing emotional stimuli, specifically affecting startle reflex modulation.
  • This deficit in affective processing appears independent of self-reported emotional experience or autonomic arousal.
  • Findings highlight a distinct emotional processing anomaly in psychopaths, separate from general antisocial tendencies.