Psychometric properties of the Interpersonal Style Inventory

This study investigated the reliabilities and conjectured factor structure of the subscales comprised by Lorr and DeJong's (1986) abbreviated form of the Interpersonal Style Inventory (ISI). The results suggest that internal consistency reliabilities of the subscales are presently inadequate for clinical or research purposes. The five-factor structure described by Lorr (1986) appeared to conform well to the empirical grouping in the data set. Only one scale, Approval Seeking, appeared incorrectly placed according to the a priori description. Another weakness in the a priori structure was that the Rule-Free subscale had only a minor role in identifying its conjectured factor. These results were based on ISI protocols from 268 adults. Overall's (1974) marker variable factor analysis was implemented to assess the adequacy of the a priori factor structure.