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positive reinforcement

1. an increase in the probability of occurrence of some activity because that activity results in the presentation of a stimulus or of some circumstance.

2. the procedure of presenting a positive reinforcer after a response. Compare negative reinforcement.

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Psychology term of the day

January 19th 2025

short-wavelength pigment

short-wavelength pigment

the photopigment present in one of the three populations of retinal cones that has maximum sensitivity to a wavelength of 419 nm. The absence of the gene for the short-wavelength pigment causes tritanopia, a form of color blindness in which blue and green are confused with one another. See also long-wavelength pigment; medium-wavelength pigment.