Mental set alters visibility of moving targets

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Science  07 Oct 1977:
Vol. 198, Issue 4312, pp. 60-62
DOI: 10.1126/science.897682


An observer's knowledge of a moving target's direction and velocity enhances detectability. In addition, knowledge of direction and velocity speeds an observer's reaction to the motion of a previously stationary target. Since rival, nonperceptual hypotheses can be ruled out, these effects represent a direct modulation of vision by mental set.