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Although group work has the potential to both reduce and increase the effort expenditure of its members, effort losses (i.e., reduced effort in group- versus individual work) have long been perceived as (nearly) inevitable in Social Psychology. This notion was elicited, accompanied, and bolstered by (i) pessimistic theorising on group productivity, and (ii) the primary use of laboratory experiments to study effort expenditure in groups. In this contribution, we adopt a more optimistic theoretical perspective. We review a series of consecutive field and vignette studies showing that individuals often work harder in groups than alone (i.e., effort gains in groups). We show that effort gains in groups are robust and can be reliably observed under various theoretically derived conditions. We also illustrate that effort gains in groups cannot be explained by various alternative explanations, and illuminate underlying mechanisms and moderators of effort gains in groups in field settings. We conclude our review by elaborating on the relevance of our findings for current theorising, the motivating design of group work, and new directions in the study of effort expenditure during group work.

In field settings group members (often) show effort gains instead of social loafing