Casco C, Morgan M J, Ward R M, 1989, "Spatial properties of mechanisms for detection of moving dot targets in dynamic visual noise" Perception 18(3) 285 – 291
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Spatial properties of mechanisms for detection of moving dot targets in dynamic visual noise
Clara Casco, Michael J Morgan, Roger M Ward
Received 11 May 1987, in revised form 20 January 1989
Abstract. The maximum displacement threshold for direction discrimination (dmax) was determined for single or paired dot targets moving discretely against a background of dynamic visual noise. dmax rose as the spatial density of noise was reduced, or when the interframe interval was decreased. dmax was greater for dot pairs than for single dots, and rose progressively as the distance between the dots was reduced. dmax was also greater if the orientation of the target dot pairs differed from the orientation of paired dots in the background noise. Dichoptic presentation of the target and background noise allowed the target to be detected with an accuracy that did not depend on displacement.
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