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. 2015 Feb 24;6:6. doi: 10.3389/fpsyg.2015.00006

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Copyright © 2015 Silverstein.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Model 1 with noise masks showing aggregate percentage of targets completed in V1, V2, and both V1 and V2 with an increasing SOA. The target and noise mask stimulation occurred in the same hypercolumn. Activity is shown with feedback connections (w fb) from V2 to V1 and without feedback connections (wo fb). The behavior represents type-A and type-B masking effects. Activation of both V1 and V2 represents activation across visual areas, which is assumed to be necessary for signal propagation up the visual stream to achieve conscious perception. (A) Illustrates aspects of a type-B masking with stimulation of four points for the target and noise mask. (B) Illustrates aspects of type-A masking with stimulation of four points for the target and five points for the noise mask, representing a higher masking salience.