Abrupt Luminance Change Pop-Outs: Abrupt Color Change Does Not

摘要

The present study investigated whether an isoluminant color change pops-outindicating 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. Reaction time, Search, Vision.