Abrupt Luminance Change Pops-Out: Abrupt Color Change Does Not

Abstract

The present study investigated whether an isoluminant color change pops-out indicating that it can be detected pre-attentively in parallel. Experiment 1 shows that an abrupt color change presented on an isoluminant background does not pop-out. However, when the color change is accompanied by a small luminance change, it pops-out and attracts attention. Experiment 2 shows that the pop-out is fully due to the luminance change and not to the color change. Experiment 3 shows that the failure to find a pop-out at isoluminance cannot be attributed to the Limited temporal resolution for chromatic stimuli. The results are in agreement with physiological findings regarding the parvo and magno system.

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Document Details

Document Type
Technical Report
Publication Date
Oct 13, 1993
Accession Number
ADA273762

Entities

People

  • J. Theeuwes

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Agreements
  • Computers
  • Contrast
  • Detection
  • Electronics Laboratories
  • Errors
  • Information Processing
  • Intact Stability
  • Intervals
  • Luminance
  • Measurement
  • Observers
  • Orientation (Direction)
  • Perception
  • Personal Computers
  • Psychology
  • Reaction Time

Readers

  • Vision Science/Vision Psychology/Cognitive Neuroscience.