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A complete understanding of visual phonetic perception (lipreading) requires linking perceptual effects to physical stimulus properties. However, the talking face is a highly complex stimulus, affording innumerable possible physical measurements. In the search for isomorphism between stimulus properties and phoneticeffects, second-order isomorphism was examined between theperceptual similarities of video-recorded perceptually identified speech syllables and the physical similarities among the stimuli. Four talkers produced the stimulus syllables comprising 23 initial consonants followed by one of three vowels. Six normal-hearing participants identified the syllables in a visual-only condition. Perceptual stimulus dissimilarity was quantified using the Euclidean distances between stimuli in perceptual spaces obtained via multidimensional scaling. Physical stimulus dissimilarity was quantified using face points recorded in three dimensions by an optical motion capture system. The variance accounted for in the relationship between the perceptual and the physical dissimilarities was evaluated using both the raw dissimilarities and the weighted dissimilarities. With weighting and the full set of 3-D optical data, the variance accounted for ranged between 46% and 66% across talkers and between 49% and 64% across vowels. The robust second-order relationship between the sparse 3-D point representation of visible speech and the perceptual effects suggests that the 3-D point representation is a viable basis for controlled studies of first-order relationships between visual phonetic perception and physical stimulus attributes. 相似文献
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Tibor R. Machan 《Philosophia》1998,26(3-4):441-463
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Kate Brittlebank Kathleen D. Morrison Christopher Key Chapple D. L. Johnson Fritz Blackwell Carl Olson Chenchuramaiah T. Bathala Gail Hinich Sutherland Gail Hinich Sutherland Ashley James Dawson Nancy Auer Falk Carl Olson Dan Cozort Karen Pechilis Prentiss Tessa Bartholomeusz Katharine Adeney D. L. Johnson Heidi Pauwels Paul Waldau Paul Waldau C. Mackenzie Brown David Kinsley John E. Cort Jonathan S. Walters Christopher Key Chapple Helene T. Russell Jeffrey J. Kripal Dermot Killingley Dorothy M. Figueira John S. Strong 《International Journal of Hindu Studies》1998,2(1):117-156
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