The present study examined two methodological aspects of the form-discrimination and size-estimation tasks employed in the literature dealing with the deficit performance of schizophrenics. The results indicated that the tasks were relatively independent although level of anxiety was related to a decrease in performance level on each task. In comparing the two discriminative dimensions of angle size and horizontal distance, it was found the horizontal distance was more difficult especially for high-anxiety normals. This result was discussed in terms of the studies with schizophrenics which used discriminative tasks and found more errors on an angular dimension.
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References
1.
CicchettiD. V.KleinE. B.FontanaA. F.SpahnH. E.A test of censure-deficit model in schizophrenia, employing the Rodnick-Garmezy visual discrimination task. Journal of Abnormal Psychology, 1967, 72, 326–334.
2.
DunhamR. M.Sensitivity of schizophrenics to parental censure. Unpublished doctoral dissertation, Duke Univer., 1959.
3.
DunnW. L.Visual discrimination of schizophrenic subjects as a function of stimulus meaning. Journal of Personality, 1954, 23, 48–64.
4.
HarrisJ. G.Jr.Size estimation of pictures as a function of thematic content for schizophrenic and normal subjects. Journal of Personality, 1957, 25, 651–671.
5.
MagaroP. A.Perceptual discrimination performance of schizophrenics as a function of censure, social class and premorbid adjustment. Journal of Abnormal Psychology, 1967, 72, 415–420.
6.
MagaroP. A.Size estimation in schizophrenia as a function of censure, diagnosis, premorbid adjustment, and chronicity. Journal of Abnormal Psychology, 1968, in press.
7.
RodnickE. H.GarmezyN.An experimental approach to the study of motivation in schizophrenia. In JonesM. R. (Ed.), Nebraska Symposium on Motivation, 1957. Lincoln: Univer. Nebraska Press, 1957. Pp. 109–184.
8.
TaylorJ. A.A personality scale of manifest anxiety. Journal of Abnormal and Social Psychology, 1953, 48, 285–290.
9.
WinerB. J.Statistical principles in experimental design. New York: McGraw-Hill, 1962.
10.
ZahnT. P.Acquired and symbolic affective value as determinant of size estimation in schizophrenic and normal subjects. Journal of Abnormal and Social Psychology, 1959, 58, 39–47.
11.
ZahnT. P.Size estimation of picture associated with success and failure as a function of manifest anxiety. Journal of Abnormal and Social Psychology, 1960, 61, 457–462.
