The 2nd-order factors of M. Lorr's (1986) Interpersonal Style Inventory (ISI) have been interpreted as measures of the 5-factor model. To assess that hypothesis, 126 adult men and women (aged 30-89 yrs) completed the ISI and 2 measures of the model: the Revised NEO Personality Inventory and a set of adjective scales. Correlations showed significant agreement at the level of broad factors, and a joint factor analysis with individual ISI scales recovered the hypothesized 5 factors. However, several ISI scales loaded on different factors than would have been predicted from this classification in the ISI. Results confirm the generality of the 5-factor model but underscore the need for detailed empirical analyses to confirm or qualify interpretations of scales in terms of the 5-factor model.