photopic vision

the type of vision associated with light levels during daylight. Photopic vision is mediated by retinal cones, whereas vision at twilight and at night is mediated by retinal rods. Also called daylight vision. Compare scotopic vision.

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Psychology term of the day

January 18th 2025

hierarchical model of personality

a model of either within-person dynamics or individual differences in personality in which some psychological constructs are viewed as high-level variables that organize or govern the functioning of other lower level variables. For example, a hierarchical model of personality traits might view the construct sociability as being at a lower level in a hierarchy than the construct extraversion: Sociability would be seen as a form or example of the higher level trait of extraversion.