Purkinje shift

a visual phenomenon in which colors appear to change with the level of illumination. A rose, for example, may appear bright red and its leaves bright green at the beginning of twilight, then gradually change to a black flower with light gray leaves as the level of daylight declines. The Purkinje shift affects the brilliance of the red end of the spectrum before the blue end. [Jan Evangelista Purkinje]

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Psychology term of the day

January 23rd 2025

analogies test

a test of the participant’s ability to comprehend the relationship between two items and then extend that relationship to a different situation: For example, paintbrush is to paint as pen is to ___.