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Affective startle modulation in anticipation and perception.

D Sabatinelli1, M M Bradley, P J Lang

  • 1National Institute of Mental Health Center for the Study of Emotion and Attention, University of Florida, Gainesville, USA.

Psychophysiology
|July 12, 2001
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Summary

The startle reflex is heightened during anticipation of emotional pictures but changes during viewing. Emotional arousal impacts anticipation, while valence affects perception of the startle reflex.

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Area of Science:

  • Psychology
  • Neuroscience
  • Cognitive Science

Background:

  • The startle reflex, a rapid motor response to sudden stimuli, is known to be modulated by emotional states.
  • Investigating startle reflex modulation in different task contexts (anticipation vs. perception) is crucial for understanding emotional processing.

Purpose of the Study:

  • To determine if affective modulation of the startle reflex differs between anticipation and perception phases.
  • To examine the influence of emotional arousal and hedonic valence on the startle reflex.

Main Methods:

  • Participants (male, high snake phobia) anticipated and viewed affective pictures (snakes, erotica, neutral objects).
  • A neutral light cue signaled the category of the upcoming picture during a 6-s anticipation period.
  • Startle reflex was measured during both anticipation and perception phases.

Main Results:

  • Startle reflex potentiation occurred during anticipation of both unpleasant (phobic) and pleasant (erotic) pictures compared to neutral stimuli.
  • During perception, startle reflexes were potentiated by unpleasant stimuli and reduced by pleasant stimuli.
  • Emotional arousal modulated the startle reflex during anticipation, while hedonic valence modulated it during perception.

Conclusions:

  • Affective modulation of the startle reflex is context-dependent, differing between anticipation and perception.
  • Emotional arousal plays a key role in modulating the startle reflex during anticipation.
  • Hedonic valence significantly influences startle reflex modulation during the perception of affective stimuli.