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An exploratory study into the factor structure of the Personal Beliefs Inventory (PBI) was conducted. The Wherry-Wherry hierarchical factor analysis was employed to analyze the 60 X 60 intercorrelation matrix of PBI items. The hierarchical solution revealed a general PBI factor structure that implies low self-worth, an attitude consistent with Ellis's theory of emotional disturbance. In addition, six interpretable lower-order factors were revealed and discussed.
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Tosi et al. (1976) studied this question.
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