Abstract
We reanalyzed the data from the study of Lamarre, Busby, and Spidalieri (1983). In that study, the activity of single neurons in area 4 of the motor cortex was recorded during a bimodal detection task in which a monkey (Macaca mulatta)had to respond as quickly as possible to a visual or an auditory signal or to both (redundant trials). Manual responses on redundant trials were speeded by the presence of both signals, as is typically found. The times between signal onsets and the first changes in neuronal activity were also speeded by redundant signals, but there was no difference between redundant-signals and single-signal trials in the time between the change in neuronal activity and movement onset. These results suggest that late motor processes are not speeded by redundant signals in bimodal detection tasks.
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The authors thank Hal Pashler and James Townsend for helpful comments on earlier versions of this article.
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Miller, J., Ulrich, R. & Lamarre, Y. Locus of the redundant-signals effect in bimodal divided attention: A neurophysiological analysis. Perception & Psychophysics 63, 555–562 (2001). https://doi.org/10.3758/BF03194420
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DOI: https://doi.org/10.3758/BF03194420