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Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Attention-based perceptual learning does not affect access to awareness.

Chris L E Paffen1, Surya Gayet1,2, Micha Heilbron1,2

  • 1Experimental Psychology & Helmholtz Institute, Utrecht University, Utrecht, the Netherlands.

Journal of Vision
|April 21, 2018
PubMed
Summary
This summary is machine-generated.

Perceptual learning enhances visual processing but does not prioritize task-relevant information for awareness. Detection times for visual motion decreased generally after training, not specifically for learned stimuli.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Prioritized access to awareness is typically granted to relevant visual information.
  • The impact of prolonged relevance on subsequent awareness prioritization remains unclear.

Purpose of the Study:

  • To investigate if information relevant for an extended duration gains prioritized access to awareness even when no longer relevant.
  • To examine the effects of a perceptual learning paradigm on awareness using the breaking continuous flash-suppression (b-CFS) technique.

Main Methods:

  • A 3-day perceptual learning paradigm involving a speed-discrimination task with relevant and irrelevant motion directions.
  • Motion-coherence task pre- and post-training to validate perceptual learning.
  • Breaking continuous flash-suppression (b-CFS) paradigm to assess changes in access to awareness.

Main Results:

  • Task-relevant perceptual learning was confirmed by decreased motion-coherence thresholds for the relevant direction.
  • Access to awareness, measured by b-CFS, was not affected by task-relevant learning; detection times decreased generally.
  • A control experiment indicated that the general decrease in detection times was not caused by perceptual learning itself.

Conclusions:

  • Task-relevant perceptual learning does not selectively enhance access to awareness for previously relevant information.
  • General improvements in visual motion detection occur over time, independent of specific perceptual learning.
  • Researchers using b-CFS across multiple sessions must account for potential decreases in breakthrough times unrelated to the specific experimental manipulation.