Perception-action and the Müller-Lyer illusion: amplitude or endpoint bias?
Over the past decade there has been a great deal of controversy regarding the relative impact of visual illusions on cognitive judgments and the control of goal-directed action. We report the results of two experiments indicating that perceptual biases associated with the Müller-Lyer illusion involve a misjudgment of amplitude/extent while aiming biases involve error in the specification of a movement endpoint. This dissociation of perception and action is consistent with some aspects of Milner and Goodale's two visual system model, but not others.
Department of Kinesiology, McMaster University, Hamilton, ON, L8S 4K1, Canada.
Cheryl M
CM
Glazebrook
Victoria P
VP
Dhillon
Katherine M
KM
Keetch
James
J
Lyons
Eric
E
Amazeen
Daniel J
DJ
Weeks
Digby
D
Elliott
D000328:Adult; D015982:Bias; D001921:Brain / Q000502:physiology; D003071:Cognition / Q000502:physiology*; D005121:Extremities / Q000294:innervation / Q000502:physiology; D005260:Female; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008297:Male; D008959:Models, Neurological; D009068:Movement / Q000502:physiology*; D009483:Neuropsychological Tests; D009949:Orientation / Q000502:physiology*; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology