A systematic literature search/review was undertaken of brief early psychological interventions following trauma. Only six randomized controlled trials were found, and none of these included group interventions. Of the six trials, two studies associated the intervention with a positive outcome, two demonstrated no difference on outcome between intervention and non-intervention groups, and two showed some negative outcomes in the intervention group. This review suggests that early optimism for brief early psychological interventions including debriefing was misplaced and that there is an urgent need for randomized controlled trials of group debriefing and other early interventions