The Problem Solving Scale (PSS) is a 15-item questionnaire measuring the problem solving component of self-control behaviours. It is derived from the 36-item Rosenbaum Self-Control Schedule. This paper presents some preliminary psychometric data on the PSS from a sample of 153 patients referred for cognitive therapy. The paper reports descriptive statistics, Cronbach's Alpha Correlations, correlations of the PSS with the Beck Depression Inventory and Beck Anxiety Inventory and results of a Principal Components Analysis. The PSS has good internal reliability and, like the Self-Control Schedule itself, seems to measure a dimension of coping that is independent of age, sex and diagnostic status. The PSS may prove a useful instrument both to measure change in problem solving in therapy and to predict outcome.