The differential effectiveness of leader-led and self-directed career and life planning workshops for 98 middle-aged and older adult participants was examined. First, a test of the magnitude of change on multiple attitudinal and behavioral variables revealed that participants improved regardless of treatment condition. Those participants in the leader-led condition, however, had greater posttest employment research interview behaviors than did participants in the self-directed condition. Second, 2 theoretically derived attributes, goal directedness and sociability–structure, were chosen to test the interaction effects between potentially salient participant attributes and workshop format. By means of a multivariate multiple regression strategy, no Attribute × Treatment interactions were identified. Results of this study suggest that the career and life planning workshops were positively received regardless of format and participant attribute.