Toward a common focus in psychotherapy research.

Documenting the schisms in clinical psychology, the author suggests that clinical scientists lay aside theoretical allegiances and work together by adopting a common focus in psychotherapy research on the determinants of effectiveness. Citing evidence showing that personal and interpersonal factors are primary determinants of effectiveness, the author suggests that humanism, broadly defined, provides the best philosophical and theoretical "home" for psychotherapy. Based on the evidence presented in the article, the author describes the revolutionary changes that must occur in research, training, and practice to bring clinical psychology into alignment with the findings of contemporary science. (c) 2012 APA, all rights reserved.