achromatism

n. color blindness marked by the inability to perceive any color whatsoever: Everything is seen in different shades of gray. It is a congenital condition stemming from a lack of retinal cones. When acquired as a result of brain injury, it is called cerebral achromatopsia; the typical site of injury is the ventromedial occipital cortex of the brain (see V4). Also called achromatopsia. See also dichromatism; monochromatism; trichromatism.

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Psychology term of the day

May 9th 2024

cognitive ethology

the study of mental experiences, including consciousness and intentionality, in nonhuman animals and of the influence of these experiences on the animals’ behavior as they interact with their natural environment. Whether, and which, animals actually possess consciousness and intentionality remains a subject of controversy. [proposed in 1978 by U.S. zoologist Donald Redfield Griffin (1915–2003)]