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Educational and Psychological Measurement
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Dimensionality of the Attitudes toward Disabled Persons Scale Revisited

Marilyn Hafer

Rehabilitation Institute, Southern Illinois University

W. Russell Wright

Rehabilitation Institute, Southern Illinois University

Susan H. Godley

Rehabilitation Institute, Southern Illinois University

Data from the responses of 104 medical and rehabilitation students to the Attitudes toward Disabled Persons Scale-Form B (ATDP-B) were factor analyzed using a principal components solution, with particular attention to the problem of the number of factors to retain. Bartlett's test of the residuals was significant after the extraction of one factor, suggesting a multifactor solution. Conversely, examination of eigenvalues using the scree test, and a comparison of eigenvalues of the real data matrix with those extracted from a random numbers data matrix of the same dimensions support the unidimensionality of the ATDP-B.

Educational and Psychological Measurement, Vol. 43, No. 2, 459-463 (1983)
DOI: 10.1177/001316448304300215
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