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Pseudo-Contamination and Memory: Is There a Memory Advantage for Objects Touched by "Morphologically Deviant People"?

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Memory does not enhance recall for objects associated with people exhibiting non-infectious traits. The behavioral immune system (BIS) appears less sensitive to perceived contamination cues unrelated to actual disease risk.

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Area of Science:

  • Psychology
  • Evolutionary Psychology
  • Social Cognition

Background:

  • The behavioral immune system (BIS) is crucial for avoiding contamination.
  • Memory aids the BIS by enhancing recall of contamination cues.
  • Previous research shows objects near sick individuals are better remembered.

Purpose of the Study:

  • To investigate memory effects related to "pseudo-contaminated" sources.
  • To determine if memory is enhanced for objects associated with non-infectious morphological deviations.

Main Methods:

  • Participants viewed common objects alongside photographs of individuals with obesity, scars/burns, or unusual eyes.
  • Memory recall for these objects was assessed.
  • Discomfort ratings regarding touching the objects were collected.

Main Results:

  • Objects shown with morphologically deviant individuals were not remembered better than control objects.
  • Participants reported higher discomfort touching objects associated with deviant individuals.
  • Memory mechanisms were not significantly activated by pseudo-contamination cues.

Conclusions:

  • Memory does not appear to be a primary mechanism for the behavioral immune system when faced with non-infectious threats.
  • The BIS may differentiate between genuine infection risks and mere morphological deviations.
  • Discomfort responses are elicited by pseudo-contamination, but not necessarily memory enhancement.