Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Color Modulates the Timing of Conscious Perception via Bottom-Up and Top-Down Attention

Version 1 : Received: 15 January 2021 / Approved: 18 January 2021 / Online: 18 January 2021 (14:32:29 CET)

A peer-reviewed article of this Preprint also exists.

Valuch, C. Color Can Shorten Breakthrough Times in Continuous Flash Suppression through Increased Salience and Task Relevance. Vision 2021, 5, 13. Valuch, C. Color Can Shorten Breakthrough Times in Continuous Flash Suppression through Increased Salience and Task Relevance. Vision 2021, 5, 13.

Journal reference: Vision 2021, 5, 13
DOI: 10.3390/vision5010013

Abstract

Color can direct visual attention to specific locations through bottom-up and top-down mechanisms. Using Continuous Flash Suppression (CFS) as way to investigate the factors that gate access to consciousness, the current study investigated whether color also directly affected the timing of conscious perception. Low or high spatial frequency (SF) gratings with different orientations were shown as targets to the non-dominant eye of human participants. CFS patterns were presented at a rate of 10Hz to the dominant eye to delay conscious perception of the targets, and participants had the task to report the target’s orientation as soon as they could see it. With low-SF targets, two types of color-based effects became evident. First, when the targets and the CFS patterns had different colors, the targets entered consciousness faster than in trials where the targets and CFS patterns had the same color. Second, when participants searched for a specific target color, targets that matched these search settings entered consciousness faster compared to conditions where the target color was irrelevant and could vary from trial to trial. Thus, the current study demonstrates that color is a central feature of human perception and leads to faster conscious perception of visual stimuli through bottom-up and top-down attentional mechanisms.

Subject Areas

interocular suppression; consciousness; color vision; visual search; attentional templates; early visual system; awareness; continuous flash suppression; binocoular rivalry

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