Motor adaptation to an optical illusion

Abstract. This research investigated the effects of an orientation illusion on action, as well as the ability of the motor system to adapt to the illusion. Subjects reached out and picked up a small bar placed at various orientations. A background grating was used to induce an orientation illusion. When the direction of the illusion was reversed, the following seven trials revealed a large illusion effect in the early portion of the reach. In the subsequent seven trials, no effect of the illusion was present. This pattern of adaptation was similar to the pattern often obtained with displacing prisms, suggesting that the two types of visual distortions present the motor system with similar challenges that it meets in similar ways. These findings are consistent with a planning/control model that argues for separate visual representations underlying the planning and on-line control of reaching.

[1]  Tenaha O'Reilly,et al.  Scientific versus Statistical Inference , 1999 .

[2]  B Wallace,et al.  Effects of movement duration and visual feedback on visual and proprioceptive components of prism adaptation. , 1994, Journal of motor behavior.

[3]  Geoffrey R. Loftus,et al.  A picture is worth a thousandp values: On the irrelevance of hypothesis testing in the microcomputer age , 1993 .

[4]  M. Goodale,et al.  Does a monocularly presented size-contrast illusion influence grip aperture? , 1998, Neuropsychologia.

[5]  Peter Dixon,et al.  Why scientists valuep values , 1998 .

[6]  B Wallace,et al.  Prism Adaptation During Target Pointing From Visible and Nonvisible Starting Locations. , 1997, Journal of motor behavior.

[7]  R A Abrams,et al.  Optimality in human motor performance: ideal control of rapid aimed movements. , 1988, Psychological review.

[8]  Jacob Cohen The earth is round (p < .05) , 1994 .

[9]  A Mack,et al.  Saccadic programming and perceived location. , 1981, Acta psychologica.

[10]  P van Donkelaar Pointing movements are affected by size-contrast illusions , 1999, Experimental brain research.

[11]  J E Cutting,et al.  Comparing effects of the horizontal-vertical illusion on grip scaling and judgment: relative versus absolute, not perception versus action. , 1999, Journal of experimental psychology. Human perception and performance.

[12]  S. Goodman,et al.  Evidence and scientific research. , 1988, American journal of public health.

[13]  S. Chieffi,et al.  Visual illusion and action , 1996, Neuropsychologia.

[14]  Robert Sessions Woodworth,et al.  THE ACCURACY OF VOLUNTARY MOVEMENT , 1899 .

[15]  A M Wing,et al.  Assessing and reporting the accuracy of position measurements made with optical tracking systems. , 1990, Journal of motor behavior.

[16]  M. Goodale,et al.  Size-contrast illusions deceive the eye but not the hand , 1995, Current Biology.

[17]  Matthew Heath,et al.  The effect of a pictorial illusion on closed-loop and open-loop prehension , 2000, Experimental Brain Research.

[18]  S. Jackson,et al.  The Ponzo illusion affects grip-force but not grip-aperture scaling during prehension movements. , 2000, Journal of experimental psychology. Human perception and performance.

[19]  B. Bridgeman,et al.  Interaction of cognitive and sensorimotor maps of visual space , 1997, Perception & psychophysics.

[20]  E Brenner,et al.  Perception and action are based on the same visual information: distinction between position and velocity. , 1995, Journal of experimental psychology. Human perception and performance.

[21]  Melvyn A. Goodale,et al.  The Effect of Pictorial Illusion on Prehension and Perception , 1998, Journal of Cognitive Neuroscience.

[22]  J. F. Soechting,et al.  Sensorimotor representations for pointing to targets in three-dimensional space. , 1989, Journal of neurophysiology.

[23]  D. Carey,et al.  More thoughts on perceiving and grasping the Müller–Lyer illusion , 1999, Neuropsychologia.

[24]  M. Goodale,et al.  The visual brain in action , 1995 .

[25]  R. C. Oldfield The assessment and analysis of handedness: the Edinburgh inventory. , 1971, Neuropsychologia.