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Why are injuries disgusting? Comparing pathogen avoidance and empathy accounts.

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Disgust from injuries stems from empathy and vicarious pain, not infection fears. This research differentiates injury-related disgust from pathogen-avoidance disgust.

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Area of Science:

  • Psychology
  • Social Psychology
  • Emotions Research

Background:

  • The pathogen-avoidance perspective suggests disgust evolved to prevent infection from injuries.
  • An alternative hypothesis proposes that disgust towards injuries is a result of empathic simulation.

Purpose of the Study:

  • To investigate the emotional underpinnings of disgust elicited by injuries.
  • To differentiate the disgust response to injuries from the disgust response to pathogens.

Main Methods:

  • Factor analysis of disgust ratings for injury and pathogen stimuli.
  • Behavioral experiment assessing willingness to touch contaminated items.
  • Analysis of subjective feeling descriptions.
  • Regression analysis predicting disgust levels.

Main Results:

  • Injury and pathogen items formed separate factors in disgust ratings.
  • Participants showed less willingness to touch infection-contaminated items than equally disgusting injury-contaminated items.
  • Injury stimuli were associated with empathy and vicarious pain, unlike infection stimuli.
  • Disgust towards injuries was predicted by pain and horror, while disgust towards infections was predicted by infectiousness, pain, and horror.

Conclusions:

  • Disgust reported towards injuries is an empathic response to vicarious pain, distinct from pathogen-avoidance disgust.
  • The findings challenge the sole reliance on pathogen-avoidance as an explanation for injury-elicited disgust.