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.
Glazebrook
Cheryl M
CM
Department of Kinesiology, McMaster University, Hamilton, ON, L8S 4K1, Canada.
Dhillon
Victoria P
VP
Keetch
Katherine M
KM
Lyons
James
J
Amazeen
Eric
E
Weeks
Daniel J
DJ
Elliott
Digby
D
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