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phi-phenomenon
[ fahy-fi-nom-uh-non, -nuhn ]
noun
Psychology.
plural phi-phenomena [fahy, -fi-nom-, uh, -n, uh].
- motion perceived by a subject, especially the illusion of movement produced when stationary stimuli, as pictures or lights, are presented in rapid succession and are sometimes in slightly different positions.
phi-phenomenon
/ ˈfaɪfɪˌnɒmɪnən /
noun
- the illusion that when two lights are rapidly turned on and off in succession something appears to move backwards and forwards between them while the lights stay stationary
- a similar illusion in which one light appears to move smoothly backwards and forwards
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Word History and Origins
Origin of phi-phenomenon1
First recorded in 1925–30
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Word History and Origins
Origin of phi-phenomenon1
C20: arbitrary use of Greek phi
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