The aim of this study was twofold. The first aim was to study the effect of an intervention combining team feedback and guided reflexivity on virtual teams' affective outcomes. The second was to examine the mediating role of perceived social loafing in this relationship. An experimental laboratory study was carried out with 54 teams randomly assigned to an experimental condition or a control condition. Results showed that this intervention had an effect on satisfaction with the result, but not on group cohesion and satisfaction with the team. Moreover, perceived social loafing fully mediated the effect of this intervention on group cohesion and partially mediated its effect on satisfaction with the team and the result.