When treating a client or testifying in court, clinicians should be aw
are of how they make judgments and when their judgments are likely to
be correct and when they are likely to be wrong. Research on the valid
ity of judgments is reviewed along with research on the cognitive proc
esses of clinicians. Some of the results are surprising. For example,
recent research indicates that clinicians might be able to make modera
tely valid long-term predictions of violence. Finally, recommendations
are made for improving clinical judgment, and comments are made about
the appropriate use of statistical prediction rules and automated ass
essment test reports.