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.
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