Educabile retardates reported pulse numerosity in varying length sequences under single- and alternating-tone conditions. It was hypothesized that due to anatomical differentiation greater frequency differences between the alternating tones would result in greater magnitudes of error. Ss made greater errors when different tones were alternated than when the same tone was presented repetitively, but no significant differences were found between less disparate and more disparate alternating tones. Increases in error by retardates under the alternating tone conditions were predominantly underestimations.
Get full access to this article
View all access options for this article.
References
1.
AxelrodS.GuzyL. T.Underestimation of dichotic click rates: Results using methods of absolute estimation and constant stimuli. Psychonomic Science, 1968, 12, 133–134.
2.
AxelrodS.GuzyL. T.DiamondI. T.Perceived rate of monotic and dichotically alternating clicks. Journal of the Acoustical Society of America, 1968, 43, 51–55.
3.
AxelrodS.NakaoM.Apparent slowing of bimanually alternating pulse trains. Journal of Experimental Psychology, 1974, 102, 164–166.
4.
BekesyG.von RosenblithW. A., The mechanical properties of the ear. In StevensS. S. (Ed.), Handbook of experimental psychology. New York: Wiley, 1951. Pp. 1075–1115.
5.
CheathamP. G.WhiteC. T.Temporal numerosity: I. Perceived number as a function of flash number and rate. Journal of Experimental Psychology, 1952, 44, 447–451.
6.
CheathamP. G.WhiteC. T.Temporal numerosity: II. Auditory perception of number. Journal of Experimental Psychology, 1954, 47, 425–428.
7.
ForsythD. M.ChapanisA.Counting repeated light flashes as a function of their number, their rate of presentation, and retinal location stimulated. Journal of Experimental Psychology, 1958, 56, 385–391.
8.
GarnerW. R.The accuracy of counting repeated short tones. Journal of Experimental Psychology, 1951, 41, 310–316.
9.
GuzyL. T.AxelrodS.Synchronization of unimanual and bimanual responses with monotic and dichotic clicks. Perception & Psychophysics, 1971, 9, 161–164.
10.
GuzyL. T.AxelrodS.Interaural attention shifting as response. Journal of Experimental Psychology, 1972, 95, 290–294.
11.
HoldenE. A.Jr.Unimodal and multimodal sequential information processing in normals and retardates. Journal of Experimental Psychology, 1970, 86, 181–185.
12.
HoldenE. A.Jr.Effects of temporal grouping on unimodal and multimodal sequential information processing in nonretarded and retarded subjects. American Journal of Mental Deficiency, 1971, 76, 181–184.
13.
HoldenE. A.Jr.Effects of modality categorization on unimodal and intermodal sequential information processing in normals and retardates. Psychonomic Science, 1972, 27, 236–238.
14.
HoldenE. A.Jr.Effects of stimulus alternation on sequential information processing by retarded and nonretarded subjects. Journal of Experimental Psychology, 1973, 101, 262–268.
15.
TaubmanR. E.The effect of practice with and without reinforcement on the judgment of auditory number. Journal of Experimental Psychology, 1944, 34, 143–151.
16.
TaubmanR. E.Studies in judged number: I. The judgment of auditory number. Journal of General Psychology, 1950, 43, 167–194 (a).
17.
TaubmanR. E.Studies in judged number: II The judgment of visual number. Journal of General Psychology, 1950, 43, 195–219. (b).
18.
ThorD. H.HoldenE. A.Jr.Visual perception of sequential numerosity by normals and retardates. Journal of Abnormal Psychology, 1969, 74, 676–681.
19.
WhiteC. T.CheathamP. G.Temporal numerosity: IV. A comparison of the major senses. Journal of Experimental Psychology, 1959, 58, 441–444.
20.
WoolseyC. N.Patterns of central representation in the cerebral cortex. Federation Proceedings of the American Society for Experimental Biology, 1947, 6, 437–441.
