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Visual MaskingTime slices through conscious and unconscious vision$
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Bruno Breitmeyer and Haluk Ogmen

Print publication date: 2006

Print ISBN-13: 9780198530671

Published to Oxford Scholarship Online: April 2010

DOI: 10.1093/acprof:oso/9780198530671.001.0001

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Unconscious processing revealed by visual masking

Unconscious processing revealed by visual masking

(p.253) Chapter 8 Unconscious processing revealed by visual masking
Visual Masking

Bruno G. Breitmeyer

Haluk ÖĞmen

Oxford University Press

Although the visibility of the form and surface features of a temporally prior stimulus can be completely suppressed by a temporally following one, some pre- or non-conscious processing of the former nonetheless survives perceptual suppression. Among these are neural processes that enable it to be located in the visual field, to contribute to motion perception, and to act, in turn, as a mask of a third stimulus. Moreover, a masked stimulus can pre-consciously prime feature-selective responses to the form or color of a probe stimulus following the following masked one. The suppressive effects of visual masking can be systematically related to other techniques of rendering stimuli invisible, such as binocular-rivalry suppression or application to transcranial magnetic stimulation to the occipital pole.

Keywords:   metacontrast, masked priming, form/color, binocular rivalry, transcranial magnetic stimulation

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