What is imagery: mental imagery: experiencing a sensory impression in the absence of sensory input. Visual imagery: seeing in the absence of a visual stimulus. Visual imagery is useful: provides a way of thinking that adds another dimension to purely verbal techniques. Imagery provide a way of thinking that adds another dimension to the verbal thinking. Imagery and the cognitive revolution: developed ways to measure behavior that could be used to infer cognitive processes. Paivo (1963) showed that it was easier to remember concrete words than abstract words in paired associate task: paivio (1963, 1965) Memory for words that evoke mental images is better than those that do not. Conceptual-peg hypothesis-boat and hat: shepard and meltzer (1971) Participants mentally rotated one object to see if it matched another object. Caption: stimuli for shepard and metzler"s (1971) mental rotation experiment. (excerpted with permission from. Imagery and perception: spatial correspondence between imagery and perception.