How do illusions constrain goal-directed movement: perceptual and visuomotor influences on speed/accuracy trade-off.
Recent research shows that visual processing influences the speed/accuracy trade-off people use when performing goal-directed movement. This raises the question of how this influence is produced in visual cognition. Visual influences on speed/accuracy trade-off could be produced in conscious visual perception, in non-conscious visuomotor transformation, or by some interaction of conscious perceptual and non-conscious visuomotor processes. There is independent evidence showing that both perceptual and visuomotor processes are involved in trading off speed and accuracy; however, the interaction between these processes has yet to be investigated. We present an experiment in which we show that a change in visual consciousness induced by a perceptual illusion affects the speed and accuracy of goal-directed movements, suggesting that perceptual and visuomotor processes do interact in speed/accuracy trade-off. We discuss the consequences of these results for theories of visual function more generally.
Center for Functionally Integrative Neuroscience, Aarhus University Hospital, Nørrebrogade 44, Bygning 10G, 5. Sal, 8000 Århus C, Denmark. filjcs@hum.au.dk
Joshua C
JC
Skewes
Andreas
A
Roepstorff
Christopher D
CD
Frith
D000704:Analysis of Variance; D003071:Cognition / Q000502:physiology; D005260:Female; D006040:Goals; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D009903:Optical Illusions / Q000502:physiology*; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
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