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Abstract
Summary The phenomenon of « inter-sensory facilitation » was studied in a situation of discontinuons visuo-manual pursuit with a binary choice between two directions of response. The effect of an auditory warning signal was to significantly shorten reaction times when the interval between warning and stimulus was between 0 and 240 ms. In a control situation, this interval was 4 000 ms. The analysis of the correct and incorrect responses and of their latency allowed us to conclude that the warning signal influences the specific response processes as well as having a non-specific facilitatory effect. The hypothesis in which the warning signal replaces a stimulus had however to be rejected. An examination of the length of time and the amplitude of the incorrect responses showed that the error correction does not require any visual or proprioceptive feedback. It is possible to daim that this type of correction depends on a more detailed analysis of the sensory data which initially triggered the incorrect response.
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