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.

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Psychology term of the day

November 15th 2024

stotting

n. a stiff-legged jumping display, shown by many species of ungulates, in which all four legs are off the ground at the same time. Stotting appears to communicate to predators that the individual has detected them and has enough vigor to make capture difficult. Studies show that predators are more likely to give up a hunt when an animal stots.