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Stop laughing! Humor perception with and without expressive suppression.

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Area of Science:

  • Neuroscience
  • Psychology

Background:

  • Emotion regulation strategies like reappraisal modulate emotional responses.
  • Expressive suppression (ES) inhibits emotional expression but its neurophysiological correlates, particularly with event-related potentials (ERPs), are less understood.
  • The late positive potential (LPP) is an ERP component sensitive to emotional stimuli.

Purpose of the Study:

  • To investigate the neurophysiological correlates of expressive suppression (ES) during humor perception using the late positive potential (LPP).
  • To compare the effects of spontaneous (SP) and ES conditions on subjective ratings, smiling, and LPP amplitude.

Main Methods:

  • Twenty-two female participants viewed humorous (H) and non-humorous (NH) pictures under spontaneous and expressive suppression conditions.
  • Facial muscle activity (zygomaticus) and event-related potentials (ERPs), specifically the LPP, were recorded.
  • Participants provided subjective ratings of funniness.

Main Results:

  • Spontaneous viewing led to higher funniness ratings, increased smiling, and a larger LPP for humorous stimuli compared to non-humorous stimuli.
  • Expressive suppression reduced smiling but did not alter subjective funniness ratings.
  • During ES, LPP amplitude did not differ between humorous and non-humorous stimuli, indicating similar processing resource allocation.

Conclusions:

  • Expressive suppression, like reappraisal, influences the neural processing of positive emotional stimuli.
  • ES modulates emotional responding by altering the brain's processing of humor.
  • The LPP serves as a neurophysiological marker for the effects of expressive suppression on emotion perception.