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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
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Activation of manipulation and function knowledge during visual search for objects.

Francesco Ruotolo1, Solène Kalénine1, Angela Bartolo1

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This summary is machine-generated.

Object identification prioritizes manipulation knowledge over function, especially when visual similarity is low. This research used eye-tracking to explore semantic competition during object recognition.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Computational Linguistics

Background:

  • Understanding object semantic representations is crucial for cognitive science.
  • The interplay between different knowledge types (function, manipulation, context) in object identification is not fully understood.
  • The influence of visual similarity on semantic processing requires further investigation.

Purpose of the Study:

  • To compare the temporal activation of function and manipulation knowledge during object identification.
  • To assess the impact of visual similarity and context on this process.
  • To investigate semantic competition effects using eye-tracking.

Main Methods:

  • Three eye-tracking experiments employing the Visual-World-Paradigm.
  • Participants identified objects based on auditory names presented with visual distractors.
  • Growth curve analyses were used to model competition effects.

Main Results:

  • Manipulation- and function-related objects elicited more fixations than unrelated objects.
  • Manipulation-related objects showed a temporal advantage in activation.
  • Visually similar objects attenuated semantic competition, particularly for function-related items.

Conclusions:

  • Both function and manipulation are key features in object semantic memory.
  • Manipulation knowledge activation may be prioritized in object identification when semantic competitors are absent.
  • Visual similarity can modulate semantic competition during object recognition.