Abstract
The effects of target-background similarity and background uniformity were investigated in two experiments in which subjects reported the presence or absence of an achromatic target item in arrays containing irrelevant chromatic items. In Experiment 1, both “present” and “absent” decision times were an increasing function of the similarity of a predefined target item to the background, and were shortened when the interitem similarity of the background set was increased. In Experiment 2, the effects of target-background similarity on the “present” decision were replicated when subjects were not informed on each trial as to which member of the target set might appear in the array, and the “absent” decision was faster when each row of the array comprised background items of a single color than when these items were allocated randomly to array locations. The results are interpreted in terms of the role of pre-attentive grouping operations.
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Farmer, E.W., Taylor, R.M. Visual search through color displays: Effects of target-background similarity and background uniformity. Perception & Psychophysics 27, 267–272 (1980). https://doi.org/10.3758/BF03204265
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DOI: https://doi.org/10.3758/BF03204265