Korte's laws

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Laws governing the illusion of apparent movement when two stimuli are exposed in alternation. If s is the spatial distance between the stimuli, t is their exposure time (assumed to be the same for both stimuli), i is their intensity (assumed equal), and p the interstimulus interval or pause between exposures, then for critical values of s, i, and t yielding optimal movement, the four basic laws are as follows. (a) s increases as i increases, p and t remaining constant; (b) i decreases as p increases, s and t remaining constant; (c) s increases as p increases, i and t remaining constant; (d) t increases as p increases, i and s remaining constant. The laws apply approximately to partial movement and phi movement also. Also called Koffka-Korte laws on account of the supervision of Korte's (doctoral) work by the German Gestalt psychologist Kurt Koffka (1886–1941). See also alpha movement, beta movement, gamma movement, delta movement, phi movement. [Named after the German Gestalt psychologist Adolf Korte who formulated the earliest version of them in the journal Zeitschrift für Psychologie in 1915, shortly before he died in World War I]

Subjects: Psychology.

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