Several studies have tested Weiner's model, which suggests a relationship among causal attributions regarding challenging behavior (CB), emotions, and helping behavior of staff. No studies have focused on interpersonal styles. The goals of this study were to investigate the influence of type of CB on attributions, emotions and interpersonal style of staff, the relationships among staff attributions, emotions, and interpersonal style, and the mediating function of emotions in the relation between attributions and interpersonal style. Participants were 99 staff members. CB aimed at the environment was related to higher levels of negative emotions, attributions and certain interpersonal styles such as controlling behavior. In addition, a relationship between emotions, attributions, and interpersonal style was found. However, there was no mediating function of emotions in the relationships between attributions and interpersonal style. Future research should take a more dynamic view of staff behavior and staff-client interaction into account. (Contains 2 figures and 3 tables.)