The epistemic status of inter-item correlations in Eysenck's Personality Questionnaire: the a priori versus the empirical in psychological data

Judgements of the semantic relatedness of items in Eysenck's Personality Questionnaire and the corresponding inter-item correlations were found to be significantly related. The results are taken to indicate that the inter-item correlations are knowable a priori and, hence, are not empirical. It is also argued that the reported findings themselves are knowable a priori , and that the study, therefore, is pseudoempirical, that is, attempts to test necessarily true propositions empirically. The study was intended to demonstrate concretely the distinction between a priori and empirical in psychological data, and to indicate the confusion arising when that distinction is not made.