Sensation and perception psychology
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Sensation and perception psychology is the branch of science that deals with the study of biochemical and neurological events involved in external and internal stimuli encountered by the receptor cells of a sensory organ. In psychology, sensation is the first stage in the biochemical and neurologic events that begins with the impinging of a stimulus upon the receptor cells of a sensory organ, which then leads to perception, the mental state that is reflected in statements like "I see a uniformly blue wall." In other words, sensations are believed by some, but not all psychologists, to be the first stages in the functioning of senses.
Witelo is considered a precursor of perception psychology. His Perspectiva contains much material in psychology, outlining views that are close to modern notions on the association of ideas and on the subconscious.
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