We asked 176 mental health clinicians to list factors that place a child at risk for engaging in future antisocial behavior. Participants were randomly assigned to do this in relationship to boys and girls. Listed factors were then coded into broad item categories using the Early Assessment Risk Lists (EARL). Of the 1,695 factors listed, 1,476 (87%) could be unambiguously classified under one discrete EARL factor category, providing support for the structure of the tools. Children's own antisocial behavior was seen as the most important factor, followed by experiencing abuse and having antisocial peers. In some cases, participants emphasized different risk factors for boys (e.g., having antisocial attitudes) and girls (e.g., low coping ability). The findings highlight the need to pay attention to client characteristics in developing risk assessment protocols and support continued efforts to bridge the gap between scientific research and clinical practice. (Contains 3 tables.)