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Summary
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This study shows that the brain processes impossible objects holistically, similar to real objects. This suggests holistic perception is fundamental, even for stimuli lacking coherent 3D structure.

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Holistic processingImpossible objectsObject recognitionSelective attention

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Neuroscience

Background:

  • Holistic processing is key to object perception, involving global structure decoding.
  • Previous research suggested impossible objects lack coherent 3D structure, hindering holistic representation.
  • The study investigates holistic processing for both possible and impossible objects.

Purpose of the Study:

  • To determine if holistic processing mechanisms apply to impossible objects.
  • To compare holistic perception of possible and impossible objects using Garner's task.
  • To assess the role of spatial organization principles in holistic object representation.

Main Methods:

  • Utilized Garner's speeded classification task to measure holistic processing.
  • Compared Garner interference between baseline and filtering conditions for possible and impossible objects.
  • Manipulated explicit depth information processing and judged internal object elements.

Main Results:

  • Similar Garner interference levels were observed for possible and impossible objects, indicating holistic perception for both.
  • Participants could not ignore irrelevant dimensions even when explicitly processing depth, confirming holistic processing.
  • Findings were consistent across novel object sets and Penrose triangle variations.

Conclusions:

  • Holistic processing is central to object perception, extending to impossible objects.
  • The brain employs holistic mechanisms regardless of an object's 3D structural coherence.
  • This challenges prior assumptions about the necessity of coherent 3D structure for holistic representation.