Health provider student characteristics and professional program were evaluated as predictors of attitudes toward inter-professional (IP) teams. Sixteen months after completing a self-report battery of demographic and non-ability trait measures, participants completed a second survey (N = 213), assessing components of attitudes toward IP teams. Non-ability traits showed comparable within-program predictive validities for affective reactions toward IP behavior. Additionally, results indicated the incremental predictive validity of trait Dominance and Motivational Inter-professional Team Intelligence, over professional program, for IP attitudes and affective reactions toward IP behavior, respectively. The independent, relative, and joint roles of non-ability individual differences and professional program as determinants of IP training outcomes are discussed.