[Sequential analysis and its application possibilities in clinical psychology].

This paper describes an experimental-statistical procedure widely unknown in psychology, which allows an efficient problem-solving in clinical research and practice, such as, for example, in evaluating the officiency of therapeutical strategies. The method dealt with is Wald's (1947) sequential analysis, which has been successfully applied in pharmaceutical research as well as in quality controls of industrial products. The characterization of this method and the description of its application fields are followed by an illustrative computational example.