The Strathclyde Inventory-Revised (SI-R)

Developing an outcome measure based on Rogers' theory of therapeutic change

Elizabeth Schmitt Freire, Robert Elliott, Brian Rodgers

Research output: Contribution to conferencePaper

Abstract

Results from comparative outcome studies suggest the general equivalence of psychotherapeutic treatments based on different theories and techniques, leading some to the Dodo bird verdict that “everybody has won so all shall have prizes”. However, it can also be argued that different outcomes do occur but are not detected by current research strategies. It is important, therefore, to develop research methods which have the potential to assess humanistic therapy's specific effects.

This paper reports on the refinement of such an outcome measure, the Strathclyde Inventory. The original measure was developed in 2006 according to Rogers' description of the 'fully functioning person', encompassing the dimensions of locus of evaluation, open-ness to experience, self-liking, existential living, acceptance of others and psychological adjustment. Using several sets of clinical and nonclinical data, the instrument has undergone additional analysis and item reduction using item response theory (Rasch analysis). This streamlined version manifests a bi-dimensional structure of congruence / incongruence which is seen to reflect Rogers’ core hypothesis of client distress. Further, we have been able to establish reliable change values and refined cut-off values for distinguishing between clinical and nonclinical levels of distress (overall mean = 2.46). This makes it possible to use the SI-R to assess reliable and clinically significant change.
Original languageEnglish
Publication statusUnpublished - 2012
Event10th Conference for the World Association for Person-Centered and Experiential Psychotherapy and Counseling - Antwerp, Belgium
Duration: 8 Jul 201212 Jul 2012

Conference

Conference10th Conference for the World Association for Person-Centered and Experiential Psychotherapy and Counseling
CountryBelgium
CityAntwerp
Period8/07/1212/07/12

Fingerprint

value change
psychotherapy
equivalence
research method
acceptance
human being
evaluation
Values
experience

Keywords

  • person-centred therapy
  • Outcome
  • measure development

Cite this

Freire, E. S., Elliott, R., & Rodgers, B. (2012). The Strathclyde Inventory-Revised (SI-R): Developing an outcome measure based on Rogers' theory of therapeutic change. Paper presented at 10th Conference for the World Association for Person-Centered and Experiential Psychotherapy and Counseling, Antwerp, Belgium.

The Strathclyde Inventory-Revised (SI-R) : Developing an outcome measure based on Rogers' theory of therapeutic change. / Freire, Elizabeth Schmitt; Elliott, Robert; Rodgers, Brian.

2012. Paper presented at 10th Conference for the World Association for Person-Centered and Experiential Psychotherapy and Counseling, Antwerp, Belgium.

Research output: Contribution to conferencePaper

Freire, ES, Elliott, R & Rodgers, B 2012, 'The Strathclyde Inventory-Revised (SI-R): Developing an outcome measure based on Rogers' theory of therapeutic change' Paper presented at 10th Conference for the World Association for Person-Centered and Experiential Psychotherapy and Counseling, Antwerp, Belgium, 8/07/12 - 12/07/12, .
Freire ES, Elliott R, Rodgers B. The Strathclyde Inventory-Revised (SI-R): Developing an outcome measure based on Rogers' theory of therapeutic change. 2012. Paper presented at 10th Conference for the World Association for Person-Centered and Experiential Psychotherapy and Counseling, Antwerp, Belgium.
Freire, Elizabeth Schmitt ; Elliott, Robert ; Rodgers, Brian. / The Strathclyde Inventory-Revised (SI-R) : Developing an outcome measure based on Rogers' theory of therapeutic change. Paper presented at 10th Conference for the World Association for Person-Centered and Experiential Psychotherapy and Counseling, Antwerp, Belgium.
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