The primary purpose of this study was to examine the impact of different types of self-talk (i.e., group-oriented self-talk versus individual-oriented self-talk) upon self-efficacy, collective efficacy, and performance of a dart-throwing task in a group setting. The second object was to examine the interaction individuals' between individualistic or collectivistic orientations and self-talk on their perceptions of self-efficacy and collective efficacy. Participants were 80 university students (age, M = 22.25 years, SD = 4.41). A series of 3 (self-talk intervention levels) X 2 (individualism-collectivism levels) between-groups ANOVAs revealed that both self-efficacy and collective efficacy beliefs were significantly higher in the group-oriented self-talk condition than in the control condition. Consistent with efficacy beliefs, significant differences in performance improvement were found between the group-oriented-self-talk and the control condition. However, no interaction between self-talk and individualism-collectivism was found for self-efficacy or collective efficacy. The results suggest that in interdependent contexts, group-oriented self-talk strategies could be more effective in enhancing participants' confidence in their own abilities, their team's abilities, and performance than individual-oriented self-talk strategies. Limitations and implications for the future study of efficacy beliefs within a group performance setting are discussed.