Effect of temporal and spatial stimulus relationships in controlled perceptual learning upon disappearances observed under reduced stimulation conditions

Perceptual learning was studied under reduced stimulation conditions. Simply as a result of previous close temporal and spatial concurrence, discriminably different stimuli disappear together more frequently than without such association. Simultaneous concurrence of the stimuli was more efficient than sequential in the development of associations. Other temporal and spatial stimulus-stimulus relationships were manipulated, and the results are discussed.