Strength of early visual adaptation depends on visual awareness

Randolph Blake, Duje Tadin, Kenith V. Sobel, Tony A. Raissian, Sang Chul Chong

Research output: Contribution to journalArticle

140 Citations (Scopus)

Abstract

We measured visual-adaptation strength under variations in visual awareness by manipulating phenomenal invisibility of adapting stimuli using binocular rivalry and visual crowding. Results showed that the threshold-elevation aftereffect and the translational motion aftereffect were reduced substantially during binocular rivalry and crowding. Importantly, aftereffect reduction was correlated with the proportion of time that the adapting stimulus was removed from visual awareness. These findings indicate that the neural events that underlie both rivalry and crowding are inaugurated at an early stage of visual processing, because both the threshold-elevation aftereffect and translational motion aftereffect arise, at least in part, from adaptation at the earliest stages of cortical processing. Also, our findings make it necessary to reinterpret previous studies whose results were construed as psychophysical evidence against the direct role of neurons in the primary visual cortex in visual awareness.

Original languageEnglish
Pages (from-to)4783-4788
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume103
Issue number12
DOIs
Publication statusPublished - 2006 Mar 21

All Science Journal Classification (ASJC) codes

  • General

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