This paper examines hypothesized causal relationships among interpersonal attraction, task cohesion, collective efficacy, performance, and effectiveness at the group level of analysis for 59 distance collaboration groups. Distance collaboration groups are groups that conduct their job communicating through electronically mediated devices (such as e-mail). More specifically, this study tested the following hypotheses within a path model of group effectiveness: (a) Interpersonal attraction will be positively related to task cohesion, (b) Interpersonal attraction will be positively related to collective efficacy, (c) Task cohesion will be positively related to collective efficacy, (d) In turn, collective efficacy is positively related with two dimensions of behavioral performance (demonstrating effort and facilitating team and peer performance), (e) The dimensions of behavioral performance are then expected to be positively related with group effectiveness MBA and undergraduate students involved in solving course cases through virtual means (e-mail) participated in the study. The path model was tested using student's self-evaluations of behavioral performance and external raters (teaching assistants) ratings of behavioral performance. Results indicate that, in tests involving teaching assistants ratings of performance, interpersonal attraction and task cohesion were positively related and led to collective efficacy. Collective efficacy had a weak positive relationship with group performance, and group performance led to group effectiveness. In summary, the study provides tentative support for the hypothesized path model in a distance collaboration context. The implications of these findings for the study of distance collaboration groups and the practical implications of these findings are discussed