Object substitution masking reinstated by color change of a previewed mask(Summary of Awarded Presentation at the 30th Annual Meeting)

概要

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Perception of a briefly presented target is impaired when a simultaneously onsetting sparse mask persists beyond the target duration, compared to when the target and the mask offset together. This is a type of backward masking, called object substitution masking (OSM). Previous studies have reported a mask preview effect in which OSM is largely attenuated by prior presentation of the mask. We investigated whether and how the abrupt color change of a previewed mask affects the mask preview effect. The basic mask preview effect was replicated. Furthermore, introducing a transient color change of the mask at target onset disrupted the mask preview effect, that is, OSM was reinstated. In terms of the role of surface features in establishment and maintenance of episodic object representations, we propose that a large color change allows the previewed mask to recompete with the target.
2012-09-30