The Dissenter

#1146 Brad Duchaine: Face Perception, Prosopagnosia, and Prosopometamorphopsia

22 snips
Sep 5, 2025
Guest
Brad Duchaine
In this discussion with Brad Duchaine, a Professor at Dartmouth College, listeners dive deep into the fascinating world of face perception. Duchaine unpacks prosopagnosia, a condition that hinders face recognition, and its significant psychosocial impacts, including loneliness. He also explores prosopometamorphopsia, a rare distortion of facial perception, detailing how contextual influences can alter our visual experiences. With insights into the brain's mechanisms and potential improvements in recognition abilities, this conversation sheds light on the complexities of social perception.
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INSIGHT

Face Memory Is Engaged Very Rapidly

  • Face perception precedes and feeds rapid face-memory matching within ~250 ms.
  • Familiarity modulates responses after 250 ms, showing memories are recruited very early in processing.
ADVICE

Expect Modest, Short-Lived Training Gains

  • Training can produce modest, short-lived improvements in prosopagnosia performance.
  • Expect small gains and limited persistence; more research is needed for durable therapies.
INSIGHT

Face Distortions Reveal Face-Specific Processing

  • Prosopometamorphopsia (PMO) causes face-only shape distortions that can worsen over seconds and are highly distressing.
  • PMO is rare but provides a unique window into face-specific perceptual mechanisms.
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