A NEW THEORY OF VISUAL DETECTION.
Defense Technical Information Center, 1953 - Education - 1 pages
A theory of visual detection is presented in which the visual system is considered a communication channel with internal noise. Experimental results confirmed the role of variables which were not purely sensory. The ability of subjects to detect visual signals was measured in one session in which the probability of signal existence was 0.8 and in a second session in which the probability was 0.4. In the second session the actual criteria of seeing changed and the subjects reported seeing things which they were unable to see. The assumptions of this new theory were compared with those of the conventional psychophysical theory.
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