prothetic stimulus dimension

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Any stimulus dimension that varies continuously and produces continuous changes in perception, the standard example being the wavelength or frequency of sound, which produces continuous changes in perceived pitch as it varies continuously, whereas light produces qualitative perceptual changes. Compare categorical perception, metathetic stimulus dimension. [From Greek prothetikos placed in front, from pro before + tithenai to place + -ikos of, relating to, or resembling]

Subjects: Psychology.

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