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Four-month-old infants show a face inversion effect when recognizing novel poses of familiar faces. This suggests infants process upright and inverted faces differently under specific conditions.

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Area of Science:

  • Developmental Psychology
  • Cognitive Neuroscience
  • Infant Perception

Background:

  • The face inversion effect, where inverted faces are harder to recognize than upright ones, is well-documented in adults.
  • Previous research on infants' face perception has yielded mixed results regarding the face inversion effect.

Purpose of the Study:

  • To investigate the presence of the face inversion effect in 4-month-old infants.
  • To determine if infants' face recognition is modulated by face orientation.

Main Methods:

  • Habituation to criterion followed by a novelty preference paradigm was employed.
  • Experiment 1: Habituation to a single face image, followed by recognition of the same image (upright vs. inverted).
  • Experiment 2: Habituation to a face in various poses, followed by recognition of a new pose (upright vs. inverted).

Main Results:

  • No difference in recognition performance for upright versus inverted faces when habituated to a single image (Experiment 1).
  • Higher recognition performance for upright faces compared to inverted faces when habituated to a face in multiple poses (Experiment 2).

Conclusions:

  • Four-month-old infants demonstrate the face inversion effect under specific experimental conditions.
  • Infants' face processing is sensitive to orientation, particularly when recognizing novel variations of familiar faces.