Consciousness and Cognition 22 (3):996-1002 (2013)

Abstract
Legally blind participants were able to identify a visual stimulus attribute in the absence of consciously identifying its presence. Specifically, participants—with their corrective lenses removed—correctly guessed the hour-hand position above chance on a clockface shown on a computer screen. This occurred both when presented in a 1-clockface display , as well as when shown a display containing 4 clockfaces , in which only 1 face contained a hand. Even more striking, hand identification accuracy in the 4-clockface condition was comparable whether the clockface containing the hand was or was not correctly identified. That legally blind individuals are capable of identifying stimulus attributes without conscious awareness provides an additional vehicle for exploring implicit perception. Consistent with previous research, the visualsystem can apparently cope with degraded visual input through information available through a secondary pathway via the superior colliculi
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DOI 10.1016/j.concog.2013.07.002
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References found in this work BETA

Implicit Memory: History and Current Status.Daniel L. Schacter - 1987 - Journal of Experimental Psychology 13 (3):501-18.
Relative Blindsight in Normal Observers and the Neural Correlate of Visual Consciousness.Hakwan C. Lau & Richard E. Passingham - 2006 - Proceedings of the National Academy of Sciences of the United States of America 103 (49):18763-18768.

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