The articles by Elkins (D. N. Elkins, 2012, Toward a common focus in psychotherapy research, Psychotherapy, 49, pp. 450-454) and Hayes (S. C. Hayes, 2012, Humanistic psychology and contextual behavioral perspectives, Psychotherapy, 49, pp. 455-460) serve as a springboard for a call for a renewal of personological methods in studies of the psychotherapeutic relationship-methods that can investig...