Abstract
In this article, we examine the concordance among 19 empirical confusion matrices for visual and tactual recognition of capital letters of the alphabet. As a measure of concordance, we employed an index based on within-stimulus triads of letters. Unlike correlation measures of agreement that are based on a one-to-one matching of matrix elements, the selected index directly captures the internal structures of the confusion matrices prior to the comparison. Permutation tests revealed statistically significant concordance among 166 of 171 pairs of matrices in the study. Concordance of confusion structure among tactual matrices tended to be somewhat stronger than concordance among the visual matrices.
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References
Craig, J. C. (1979). A confusion matrix for tactually presented letters.Perception & Psychophysics,26, 409–411.
Edgington, E. S. (1964). Randomization tests.Journal of Psychology,57, 445–449.
Edgington, E. S. (1966). Statistical inference and nonrandom samples.Psychological Bulletin,66, 486–487.
Edgington, E. S. (1969). Approximate randomization tests.Journal of Psychology,72, 143–149.
Fisher, D. F., Monty, R. A., &Glucksberg, S. (1969). Visual confusion matrices: Fact or artifact?Journal of Psychology,71, 111–125.
Fisher, R. A. (1935).The design of experiments. London: Oliver & Boyd.
Gilmore, G. C., Hersh, H., Caramazza, A., &Griffin, J. (1979). Multidimensional letter similarity derived from recognition errors.Perception & Psychophysics,25, 425–431.
Hayes, A. F. (1996). Permutation test is not distribution-free: Testing H0: ρ=0.Psychological Methods,1, 184–198.
Hubert, L. J. (1978). Generalized proximity function comparisons.British Journal of Mathematical & Statistical Psychology,31, 179–192.
Hubert, L. J. (1987)Assignment methods in combinatorial data analysis. New York: Marcel Dekker.
Johnson, K. O., &Phillips, J. R. (1981). Tactile spatial resolution: I. Two-point discrimination, gap detection, grating resolution, and letter recognition.Journal of Neurophysiology,46, 1177–1191.
Kikuchi, T., Yamashita, Y., Sagawa, K., &Wake, T. (1979). An analysis of tactile letter confusions.Perception & Psychophysics,26, 295–301.
Loomis, J. M. (1974). Tactile letter recognition under different modes of stimulus presentation.Perception & Psychophysics,16, 401–408.
Loomis, J. M. (1982). Analysis of tactile and visual confusion matrices.Perception & Psychophysics,31, 41–52.
Mewhort, D. J. K., &Dow, M. L. (1979). Multidimensional letter similarity: A confound with brightness?Perception & Psychophysics,26, 325–326.
Miller, G. A., &Nicely, P. E. (1955). Analysis of perceptual confusions among some English consonants.Journal of the Acoustical Society of America,27, 338–352.
Pew, R. W., & Gardner, G. T. (1965). [Unpublished data]. University of Michigan, Ann Arbor.
Phillips, J. R., Johnson, K. O., &Browne, H. M. (1983). A comparison of visual and two modes of tactual letter resolution.Perception & Psychophysics,34, 243–249.
Pittman, E. J. G. (1937). Significance tests which may be applied to samples from any population: II. The correlation coefficient test.Journal of the Royal Statistical Society,4, 225–232.
Townsend, J. T. (1971a). Alphabetic confusion: A test of models for individuals.Perception & Psychophysics,9, 449–454.
Townsend, J. T. (1971b). Theoretical analysis of an alphabet confusion matrix.Perception & Psychophysics,9, 40–50.
van der Heijden, A. H. C., Malhas, M. S. M., &van den Roovaart, B. P. (1984). An empirical zinterletter confusion matrix for continuousline capitals.Perception & Psychophysics,35, 85–88.
Vega-Bermudez, F., Johnson, K. O., &Hsiao, S. S. (1991). Human tactile pattern recognition: Active versus passive touch, velocity effects, and patterns of confusion.Journal of Neurophysiology,65, 531–546.
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Brusco, M.J. On the concordance among empirical confusion matrices for visual and tactual letter recognition. Perception & Psychophysics 66, 392–397 (2004). https://doi.org/10.3758/BF03194887
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DOI: https://doi.org/10.3758/BF03194887