Psychotherapy Integration: Contributions from Lifestyle Theory

The lifestyle theory of intervention is evaluated with respect to its status as an integrated psychotherapy using theoretical integration, technical eclecticism, and the common factors approach as criteria. Because lifestyle theory integrates concepts from evolutionary biology, existential philosophy, cognitive psychology, social learning theory, and various therapeutic models it satisfies preliminary criteria for theoretical integration. To the extent that it provides an internally consistent model and makes use of techniques from disparate schools of psychotherapy, it adopts a technical eclectic approach to intervention. The lifestyle model also appears to qualify as an integrated psychotherapy by virtue of its attention to several common factors in psychotherapy.