Mental set alters visibility of moving targets.
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.
D003071:Cognition / Q000502:physiology*; D005133:Eye Movements; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D014794:Visual Fields; D014796:Visual Perception / Q000502:physiology*