Differential effects of forward and backward masks on the relationship between perception and action

The European Journal of Neuroscience
A DeplanckeY Coello

Abstract

A recent series of experiments has shown that the effects of near-threshold stimuli on perceptual and motor responses are highly dependent on experimental conditions. In particular, motor influences of near-threshold distractors were observed when using low-contrast unmasked stimuli and high-contrast masked stimuli although only the latter affected motor responses in the absence of stimulus awareness. These results are compatible with neurophysiological models of visual masking, suggesting that early neural responses to a visual stimulus can be decomposed in feedforward activations to-and feedback activations from-higher visual areas, correlating respectively with the actual presence of the stimulus and its conscious perception. We tested the compatibility between these neurophysiological models and the behavioural data obtained in near-threshold experiments. We recorded fast reaching movements directed to a highly visible target followed by a report of the presence of a near-threshold distractor presented either at low contrast without mask or at high contrast with a backward or forward mask. Analysis of hand trajectories revealed that deviations toward the distractor were observed in the no-mask condition when the distractor ...Continue Reading

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Citations

Sep 20, 2016·The European Journal of Neuroscience·Antoine DeplanckeYann Coello
May 16, 2019·Journal of Vision·Nicolas Becker, Uwe Mattler

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