PROPERTIES OF THE HOLLEY-GUILFORD 'G INDEX OF AGREEMENT' IN R AND Q FACTOR ANALYSIS |
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| Authors: | Philip Levy |
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| Institution: | Department of Psychology, University of Birmingham, England |
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| Abstract: | The Holley-Guilford G index for 2×2 contingency tables has spatial properties which suggest that, as with other such indices, problems may arise in factor analysis of G matrices. Two response models—Guttman's Simplex and the Coombs-Kao conjunctive case—are used to provide data for exploring the behaviour of G. In particular, the claim that G equates person means and variances in Q analysis is not substantiated. |
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