Title page for ETD etd-03232005-172348


Type of Document Dissertation
Author Davis, Sean David
Author's Email Address seandavis@vt.edu
URN etd-03232005-172348
Title Common and Model-Specific Factors: What Marital Therapy Model Developers, Their Former Students, and Their Clients Say About Change.
Degree PhD
Department Human Development
Advisory Committee
Advisor Name Title
Piercy, Fred P. Committee Chair
Johnson, Scott W. Committee Member
Keeling, Margaret L. Committee Member
Sprenkle, Douglas K. Committee Member
Keywords
  • couple therapy
  • common factors
  • marital therapy
  • change processes
  • marital therapy theory
Date of Defense 2005-03-23
Availability unrestricted
Abstract
Meta-analytic reviews of decades of comparative efficacy psychotherapy research consistently reveal that all tested models of marriage and family therapy (MFT) work, and they generally work equally well. Researchers have hypothesized that this may be due to factors common across models responsible for change. Despite a sizable body of common factors literature in psychology, such research in MFT is still in its infancy. The purpose of this study is to contribute to the development of a theory of common factors responsible for change in MFT. Semi-structured, open-ended qualitative interviews were conducted with three different MFT model developers (i.e., Dr. Susan M. Johnson, Emotionally Focused Therapy; Dr. Frank M. Dattilio, Cognitive Behavioral Therapy; and Dr. Richard C. Schwartz, Internal Family Systems Therapy), Dr. Johnson and Dr. Schwartz’s former students, and each of their former clients who had terminated therapy successfully. Transcripts were coded using the grounded theory techniques of open coding, axial coding, and relational statements. Coding was done utilizing a constant comparative method in which data were simultaneously analyzed and coded. Common factors fell into two main categories of model-dependent factors and model-independent factors. Factors within the model-dependent category include those aspects of therapy directly informed by the therapist’s model. Model-dependent categories include common conceptualizations, common interventions, and common outcomes. Factors within the model-independent category include general aspects of therapy that are not directly related to the therapist’s model. Model-independent categories include client variables, therapist variables, the therapeutic alliance, therapeutic process, and expectancy and motivational factors. Each model-dependent and model-independent category has several subcategories. Results are discussed in both model-specific and common factors conceptualizations. A sequential model outlining how model-dependent factors appear to combine to produce therapeutic change while being mediated by model-independent variables is proposed. The findings are integrated with the current common factors literature in psychology and MFT. Clinical, training, and research implications are discussed.
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