| Summary: | The history of apparent movement begins in the 1820's (Boring, 1942), but its full importance for psychology was not recognized until the publication of Wertheimer's paper, Experimentelle Studien über das Sehen von Bewegung, in 1912 (translated in greater part in Shipley, 1961). Wertheimer saw the significance of the tact that, under certain temporal conditions, the successive presentation of a pair of stationary visual abjects "at a considerable spatial distance from one another," evokes the perception of movement. He called this impression of motion in the spatial interval between the two abjects the phi-phenomenon. [...]
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