The purpose of the experiment was to determine the relative discriminability of 40 tactual patterns prepared by a special embossage technique. The method of paired comparisons was used, with 150 Ss, making 200 discrimination judgments each. Marked differences in discriminability were found, with each of at least 11 patterns discriminable enough from all others to be useful in the preparation of material such as maps for the blind.
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References
1.
AustinT. R.SleightR. B.Accuracy of tactual discrimination of letters, numerals, and geometric forms. J. exp. Psychol., 1952, 43, 239–247. (a).
2.
AustinT. R.SleightR. B.Factors related to speed and accuracy of tactual discrimination. J. exp. Psychol., 1952, 44, 283–287. (b).
3.
BauerH. J.Discrimination of tactual stimuli. J. exp. Psychol., 1952, 44, 455–459.
4.
DeGowinE. L.DimmickF. L.The tactual perception of simple geometrical forms. J. gen. Psychol., 1928, 1, 114–122.
5.
GeldardF. A.Adventures in tactile literacy. Amer. Psychologist, 1957, 12, 115–124.
6.
JenkinsW. O.The tactual discrimination of shapes for coding aircraft-type controls. In FittsP. M. (Ed.), Psychology of equipment design. Report No. 19, Army Air Forces Aviation Psychology Program Research Reports. Washington: U. S. Gov't Print. Off., 1947. Pp. 199–205.
7.
KatzD.Der Aufbau der Tastwelt. Z. Psychol. Ergbd., 1925, No. 11.
8.
MajorD. R.Cutaneous perception of form. Amer. J. Psychol., 1899, 10, 143–147.
9.
MeyersE.EthingtonD.AshcroftS.Readability of braille as a function of three spacing variables. J. appl. Psychol., 1958, 42, 163–165.
10.
Report of the Commission on Uniform Type for the Blind, American Association of Instructors for the Blind, 1920 Convention.
11.
RosenbloomB. L.Configurational perception of tactual stimuli. Amer. J. Psychol., 1929, 41, 87–90.
12.
WeitzJ.The coding of aircraft control knobs. In FittsP. M. (Ed.), Psychology of equipment design. Report No. 19, Army Air Forces Aviation Psychology Program Research Reports. Washington: U. S. Gov't Print. Off., 1947. Pp. 187–198.
13.
ZiglerM. J.BarrettR.A further contribution to the tactual perception of form. J. exp. Psychol., 1927, 10, 184–192.
14.
ZiglerM. J.NorthrupK. M.The tactual perception of form. Amer. J. Psychol., 1926, 37, 391–397.
