Abrupt Luminance Change Pops-Out: Abrupt Color Change Does Not
INSTITUTE FOR PERCEPTION RVO-TNO SOESTERBERG (NETHERLANDS)
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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.
- Anatomy and Physiology