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Issue No.01 - January-June (2008 vol.1)
pp: 19-26
Jonathan M. Ehrich , University of Washington, Seattle
Martha Flanders , University of Minnesota, Minneapolis
John F. Soechting , University of Minnesota, Minneapolis
Exploration of an object by arm movement and somatosensation is a serial process that relies on memories and expectations. The present experiments tested the hypothesis that this process involves breaking the object into component shapes (primitives). This was tested by having human subjects explore shapes composed of semicircular arcs as well as quarter circles or quarter ellipses. The subjects' perception was reported using a visual display. In the first experiment, in which a series of semicircular arcs was presented, with offsets that differed from trial to trial, performance was consistent with the perception of two (left and right) semicircles. In the second experiment, subjects often failed to detect the quarter circles or quarter ellipses and again behaved as if the object was composed of two (top and bottom) semicircles. The results suggest that the synthesis of haptically sensed shapes is biased toward simple geometric objects, and that it can be strongly influenced by expectations.
Cognition, Human performance, Perception and psychophysics
Jonathan M. Ehrich, Martha Flanders, John F. Soechting, "Factors Influencing Haptic Perception of Complex Shapes", IEEE Transactions on Haptics, vol.1, no. 1, pp. 19-26, January-June 2008, doi:10.1109/TOH.2008.4
[1] D.Y. Henriques, M. Flanders, and J.F. Soechting, “Haptic Synthesis of Shapes and Sequences,” J. Neurophysiology, vol. 91, pp. 1808-1821, 2004.
[2] J. McFarland and J.F. Soechting, “Factors Influencing the Radial-Tangential Illusion in Haptic Perception,” Experimental Brain Research, vol. 178, pp. 216-227, 2007.
[3] I. Biederman, “Recognition-by-Components: A Theory of Human Image Understanding,” Psychological Rev., vol. 94, pp. 115-147, 1987.
[4] M. Riesenhuber and T. Poggio, “Models of Object Recognition,” Nature Neuroscience, vol. 3, pp. 1199-1204, 2000.
[5] J. Voisin, G. Benoit, and C.E. Chapman, “Haptic Discrimination of Object Shape in Humans: Two-Dimensional Angle Discrimination,” Experimental Brain Research, vol. 145, pp. 239-250, 2002.
[6] E.D. Fasse, N. Hogan, B.A. Kay, and F.A. Mussa-Ivaldi, “Haptic Interaction with Virtual Objects,” Biological Cybernetics, vol. 82, pp. 69-83, 2000.
[7] D.Y. Henriques and J.F. Soechting, “Bias and Sensitivity in the Haptic Perception of Geometry,” Experimental Brain Research, vol. 150, pp. 95-108, 2003.
[8] J.F. Soechting and H. Poizner, “The Use of Motion Cues in the Haptic Sense of Circularity,” Experimental Brain Research, vol. 165, pp. 413-421, 2005.
[9] J.F. Soechting, W. Song, and M. Flanders, “Haptic Feature Extraction,” Cerebral Cortex, vol. 16, pp. 1168-1180, 2006.
[10] E. Gentaz and Y. Hatwell, “Geometrical Haptic Illusions: The Role of Exploration in the Müller-Lyer, Vertical-Horizontal, and Delboeuf Illusions,” Psychonomic Bull. Rev., vol. 11, pp. 31-40, 2004.
[11] D.Y. Henriques and M. Flanders, “Distortions in the Visual Perception of Shape,” Experimental Brain Research, vol. 160, pp. 384-393, 2005.
[12] B. Treutwein, “Adaptive Psychophysical Procedures,” Vision Research, vol. 35, pp. 2503-2522, 1996.
[13] K. Suzuki and R. Arashida, “Geometrical Haptic Illusions Revisited: Haptic Illusions Compared with Visual Illusions,” Perception and Psychophysics, vol. 52, pp. 329-335, 1992.
[14] M.J. Spivey-Knowlton and B. Bridgeman, “Spatial Context Affects the Poggendorff Illusion,” Perception and Psychophysics, vol. 53, pp. 467-474, 1993.
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