psychophysics


psy·cho·phys·ics

noun plural but singular in construction \ˌsī-kō-ˈfi-ziks\

Definition of PSYCHOPHYSICS

:  a branch of psychology concerned with the effect of physical processes (as intensity of stimulation) on the mental processes of an organism
psy·cho·phys·i·cist \-ˈfi-zə-sist, -ˈfiz-sist\ noun

Origin of PSYCHOPHYSICS

International Scientific Vocabulary
First Known Use: 1878

psy·cho·phys·ics

noun plural but singular in construction \ˌsī-kō-ˈfiz-iks\   (Medical Dictionary)

Medical Definition of PSYCHOPHYSICS

: a branch of psychology concerned with the effect of physical processes (as intensity of stimulation) on the mental processes and especially sensations of an organism

psychophysics

   (Concise Encyclopedia)

Branch of psychology concerned with the effect of physical stimuli (such as sound waves) on mental processes. Psychophysics was established by Gustav Theodor Fechner in the mid-19th century, and since then its central inquiry has remained the quantitative relation between stimulus and sensation. A key tenet has been Weber's law. Psychophysical methods are used today in vision research and audiology, psychological testing, and commercial product comparisons (e.g., tobacco, perfume, and liquor).

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