We are reassured that correspondents' views (1–3)—that exploratory factor analysis should be treated with caution—coincide with our position (4). We do not say that factor analysis can be used to determine whether a syndrome exists, as Hanley et al. (1) suggest, although it might be implied by the poorly worded section subtitle in our paper. Our starting point was to consider each of the important questions to be . . .
Bibliographical notePublisher: Oxford University Press
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