metacontrastn.
/ˌmɛtəˈkɒntrɑːst/, /ˌmɛtəˈkɒntrast/, U.S. /ˌmɛdəˈkɑnˌtræst/ Psychology.
Alteration, esp. diminution, of the response to a visual stimulus as a result of a second stimulus following soon afterwards.
ΘΚΠ
the mind > mental capacity > psychology > experimental psychology > stimulus-response > response > [noun] > change in subsequent
metacontrast1950
1950 Jrnl. Optical Soc. Amer. 40 796/1 An investigation of the effect of variation of the luminance, exposure asynchrony, and spatial separation of the stimuli on the magnitude of metacontrast.
1972 Science 13 Oct. 179/3 They suggest that temporally backward and spatially lateral inhibition (metacontrast) occurs when the duration of the flash is long enough.
1995 Nature 5 Jan. 21/2 The phenomenon of backward masking, also called metacontrast, is when a later event influences an earlier event in the visual system.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).
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