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Mareike Grotheer1, Petra Hermann2, Zoltán Vidnyánszky3

  • 1Institute of Psychology, Friedrich-Schiller-University of Jena, Am Steiger 3, 07743 Jena, Germany; DFG Research Unit Person Perception, Friedrich-Schiller-University of Jena, Leutragraben 1, 07743 Jena, Germany.

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Summary
This summary is machine-generated.

Repetition suppression in the brain is influenced by the probability of stimulus repetition, even for inverted faces. This suggests that predictive coding effects on face processing may begin at earlier visual stages.

Keywords:
ExpectationFacesInversionPredictionRepetition suppression

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • Repetition suppression (RS) and its modulation by repetition probability (P(rep)) support predictive coding (PC) models of visual perception.
  • The specific stage of face processing where P(rep) modulates RS remains unclear.

Purpose of the Study:

  • To investigate if P(rep) effects on RS in face processing originate from higher-level configural/holistic stages.
  • To compare P(rep) effects on RS for upright versus inverted faces.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to record brain activity.
  • P(rep) was manipulated for face stimuli in blocks.
  • RS for upright and inverted faces was analyzed.

Main Results:

  • P(rep) significantly modulated RS in the posterior fusiform face area (FFA), occipital face area (OFA), and lateral occipital complex (LO).
  • This modulation occurred independently of face orientation (upright vs. inverted).
  • No brain areas showed orientation-specific modulation of P(rep) effects on RS.

Conclusions:

  • P(rep) influences RS in the ventral visual stream even when configural/holistic face processing is compromised (i.e., for inverted faces).
  • These findings suggest that P(rep) effects on RS may arise from earlier stages of visual processing rather than higher-level face-specific areas.