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Words affect visual perception by activating object shape representations.

Samuel Noorman1, David A Neville1, Irina Simanova2

  • 1Radboud University Nijmegen, Donders Institute for Brain, Cognition and Behaviour, Centre for Cognition, Nijmegen, The Netherlands.

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Words enhance object recognition by activating shape information early in visual processing. Later, semantic category information from words influences visual perception, revealing language-vision interaction mechanisms.

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Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Visual Perception

Background:

  • Linguistic labels facilitate object recognition, but the underlying neural mechanisms remain unclear.
  • Prior research suggests words guide visual perception by activating object shape information.
  • Distinguishing the visual and semantic roles of words in recognition is crucial.

Purpose of the Study:

  • To investigate the neural basis of how words facilitate object recognition.
  • To differentiate the visual (shape) and semantic (category) contributions of words to visual object recognition.
  • To explore the temporal dynamics of language-visual interaction during object recognition.

Main Methods:

  • A word-picture matching experiment using electroencephalography (EEG).
  • Creation of object pictures varying in shape and semantic category.
  • Analysis of EEG data to correlate spatiotemporal patterns with shape and category similarity.

Main Results:

  • Word presentation activates referent shape representations within 100 ms, interacting with visual processing.
  • Non-visual semantic category information influences visual processing at later stages.
  • Evidence for distinct temporal roles of shape and category in word-facilitated recognition.

Conclusions:

  • Hearing a word primes visual perception through both shape and semantic information.
  • Shape-based activation occurs early, while category-based effects emerge later in visual processing.
  • Findings elucidate the intricate interplay between language and visual perception in the brain.