AN ADAPTATION-INDUCED POP-OUT IN VISUAL-SEARCH

The present study demonstrates that an object embedded in an array of identical objects can pop-out. Dependent on the stimuli preceding the search display, local (chromatic) adaptation causes an identical objec t to pop-out because it appears to have a colour (Expt 1) or brightnes s (Expt 2) that is slightly different from the colour and brightness o f the other objects in the display. Experiment 3 shows that this pop-o ut even occurs when the stimulus preceding the search display is prese nted for only 100 msec.