Abstract
The attentional cuing effects in detection and some discrimination tasks depend on the use of backward masks and on the presence of external noise in the display. These effects have been attributed to an interruption masking mechanism, which terminates stimulus processing prematurely, and an external noise exclusion mechanism, which minimizes the perceptual effects of noise. To test whether the dependencies on masking and external noise are expressions of a single mechanism, observers detected grating patch stimuli, masked with noise masks or pattern masks, presented either simultaneously or after a delay of 60–90 msec. Contrary to an external noise exclusion account, but consistent with an interruption masking account, cuing effects were largest when the masks were delayed. However, weaker cuing effects were obtained with simultaneous masks, contrary to an interruption masking account. These results suggest that attentional effects in simple visual judgments are affected by mechanisms of both kinds.
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This research was supported by Australian Research Council Discovery Grant DP0209249.
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Smith, P.L., Wolfgang, B.J. Attentional mechanisms in visual signal detection: The effects of simultaneous and delayed noise and pattern masks. Perception & Psychophysics 69, 1093–1104 (2007). https://doi.org/10.3758/BF03193947
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DOI: https://doi.org/10.3758/BF03193947