Bridging the gap between monkey neurophysiology and human perception: an ambiguity resolution theory of visual selective attention

Article Abstract:

The ambiguity resolution theory was formulated to identify the interpretation of a simultaneous stimuli that the brain processes through the use of laboratory monkeys. The ambiguity resolution theory proposes that the interpretation of stimulus by neurons in the visual cortex becomes ambiguous when multiple stimuli are absorbed simultaneously, and that if coding or interpretation is believed to be minimal in areas having small receptive fields, it is assumed that the information coded in these areas is not readily executed by the brain. These results can be applicable to humans as well.

Physiological aspects, Monkeys, Neurophysiology

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Edge-assignment and figure-ground segmentation in short-term visual matching

Article Abstract:

Edge-assignment affects performance consequences of figure-ground segmentation in short-term visual contour matching tasks. A recognition advantage for figure over ground emerges immediately on assignment of the dividing edges. Edge-assignment is helpful when size, symmetry, contrast or shapes define the figures, rather than when attention is automatically diverted toward the region of figure. Deliberate drawing of attention to a specific region of an ambiguous figure-ground display produces figural edge-matching advantage.

Analysis, Pattern perception (Psychology), Visual discrimination, Gestalt psychology, Form perception (Psychology)

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Spatial repetition blindness is modulated by selective attention to color or shape

Article Abstract:

Selective attention to color or shape minimizes spatial repetition blindness, as selecting the color of one object and the shape of another simultaneous object results in the access of both dimensions for both objects. Results of three follow-up studies confirmed that performance is only affected by repetition on both dimensions when the same dimension is judged for both stimuli, while performance is affected by repetition on both dimensions when different dimensions were judged for the two stimuli.

Psychological aspects, Human information processing

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