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Implicit perception and level of processing in object-substitution masking.

Zhe Chen1, Anne Treisman

  • 1Department of Psychology, University of Canterbury, Christchurch, New Zealand. zhe.chen@canterbury.ac.nz

Psychological Science
|April 17, 2009
PubMed
Summary
This summary is machine-generated.

Object-substitution masking (OSM) impairs target discrimination. This study found that even when targets are masked, some processing occurs beyond basic feature analysis, suggesting disruption occurs later in visual processing.

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Neuroscience

Background:

  • Object-substitution masking (OSM) is a phenomenon where target discrimination is reduced by a temporally trailing mask.
  • The precise level of visual processing affected by OSM remains debated.

Purpose of the Study:

  • To investigate the extent of target processing within object-substitution masking.
  • To determine the locus of disruption in OSM by examining feature and categorical analyses.

Main Methods:

  • Four experiments employed a novel paradigm to study OSM.
  • Response-compatibility effects between target and mask were measured with simultaneous and delayed mask offsets.

Main Results:

  • Evidence for OSM was confirmed.
  • A dissociation between perception and awareness was observed.
  • Disruption occurred when matching targets and masks required categorical but not feature-based analyses.

Conclusions:

  • The findings suggest that the disruption in OSM occurs beyond the initial feature analysis stage.
  • OSM affects higher-level visual processing, impacting awareness more than basic perceptual features.