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Granit theory of color vision

a theory that the perception of color relies on the activation of three types of cells: (a) scotopic dominators, which are retinal rods most sensitive to wavelengths of 500 nm; (b) photopic dominators, which are retinal cones most sensitive to wavelengths of 560 nm; and (c) photopic modulators, other cones sensitive to very narrow frequency ranges. [Ragnar Arthur Granit (1900–1991), Finnish-born Swedish physiologist]

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Psychology term of the day

May 26th 2024



n. ending a session in psychotherapy or counseling. Approaches to closing vary among therapists: Some allow the client to initiate the end of the session; others initiate it themselves.