THE TIME-INTENSITY RELATION IN VISUAL PERCEPTION AS A FUNCTION OF OBSERVER'S TASK.

The duration-intensity relationship was investigated for a task in which triads of digits were to be identified. Critical durations (tc) of 200-350 msec. were found for 5 Ss. Under identical stimulus conditions tc for subjective brightness, determined by a matching method, was about 100 msec. for 2 of the Ss. It was concluded that tc varies as a function of perceptual task and that it does not represent the duration of an early "sensory" phase of the visual process. (21 ref.) (PsycINFO Database Record (c) 2012 APA, all rights reserved) Language: en

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