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retrocognition

n. in parapsychology, the experiencing of a past event as if it were occurring in the present, or knowledge of a past event that includes details that could not be learned, inferred, or verified through normal means. In a test of retrocognition, the participant might be asked to guess the outcome of an earlier set of trials involving Zener cards or similar stimulus materials. Also called postcognition. See also backward displacement. Compare precognition. [coined by English poet and philologist Frederic William Henry Myers (1843–1901)]

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Psychology term of the day

December 18th 2024

acuity grating

acuity grating

a stimulus used to measure an individual’s sharpness of visual perception. It consists of alternating black and white lines spaced closely together; the point at which the participant perceives the lines to be homogeneous gives an indication of visual acuity. When the contrast of the lines is varied, the acuity grating can be used to test contrast sensitivity.