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Experimental Psychology (Russia)

Publisher: Moscow State University of Psychology and Education

ISSN (printed version): 2072-7593

ISSN (online): 2311-7036


License: CC BY-NC 4.0

Started in 2008

Published quarterly

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Open Access Journal


The Independence of a Simple Visual-Motor Reaction from the Preconscious Component of Sensation during Backward Masking by Two-Color Stimuli 169

Sobolev V.I.
Doctor of Biology, Professor, Academy of the Humanities and Pedagogics (branch), V.I. Vernadsky Crimean Federal University in Yalta, Yalta, Russia

The model of visual backward masking in its two-color modification is applicable in the study of the mechanisms of conjugation of the processes of sensory sensation formation and realization of sensorimotor reactions. The effect of the full (100 %) two-color backward masking is reliably implemented with the following values of its parameters: the duration of the test stimulus (red and green) is 0 ms, the stimulus masker (blue) is 45 ms, and the stimulus onset asynchrony (SOA) is 0.1 — 25 ms. In the range of SOA values from 25 to 35 ms, the efficiency of backward masking decreases to 14 %, and with an SOA of 40 ms, it completely disappears. The stimulus detection time (sDT) as part of a simple visual-motor reaction in the paradigm of the model of two-color backward masking does not depend on its effectiveness, the color of the test stimulus, the value of asynchrony in the range (0 — 40 ms), the duration of the stimulus-masker in the formation of a conscious light sensation. A comparative analysis of the stimulus detection time values under the conditions of full (100 %) backward masking and in its absence suggests that the mechanism of the two-color backward masking not associated with photoreceptors, but is implemented in the central parts of the visual analyzer.

Keywords: backward masking, two-color model of backward masking, “Fehrer—Raab” effect, chromatic stimulus detection time, electromyographic measurement of stimulus detection time

Column: Psychology of Perception


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