How sensitive is hand transport to illusory context effects?
A recent report that hand transport was sensitive to a size-contrast illusion (SCI) implied that the distinction between visual processing for perception versus action might only affect visual information obtained late during reaching. In this study, the presence of a perceptual SCI did not affect reaction time, movement time, or movement amplitude. However, both perception and action became sensitive to the SCI with memory-based responses. It is concluded that the distinction between visual processing for perception versus action does extend to hand transport. Immediate action is entirely based on veridical visuo-motor representations, whereas even slightly delayed actions begin to reflect distorted perceptual representations.
Fischer
M H
MH
Department of Psychology, University of Dundee, Scotland. m.h.fischer@dundee.ac.uk
D000328:Adult; D001921:Brain / Q000502:physiology; D006225:Hand / Q000294:innervation / Q000502:physiology*; D006801:Humans; D007088:Illusions / Q000502:physiology*; D009068:Movement / Q000502:physiology*; D009483:Neuropsychological Tests; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*