Juan Martín Gómez Penedo1, Thomas Berger1, Martin Grosse Holtforth1,2, Tobias Krieger1, Johanna Schröder3, Fritz Hohagen4, Björn Meyer5,6, Steffen Moritz7, Jan Philipp Klein4. 1. Department of Clinical Psychology and Psychotherapy, University of Bern, Switzerland. 2. Psychosomatic Competence Center, University Hospital Inselspital, Bern, Switzerland. 3. Department of Psychiatry and Psychotherapy, Institute for Sex Research and Forensic Psychiatry, University Medical Center Hamburg-Eppendorf, Hamburg, Germany. 4. Department of Psychiatry and Psychotherapy, Lübeck University, Lübeck, Germany. 5. GAIA AG, Hamburg, Germany. 6. Department of Psychology, University of London, London, United Kingdom. 7. Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Abstract
OBJECTIVE: This study analyses the psychometric properties of the Working Alliance Inventory adapted for guided Internet interventions (WAI-I). METHODS: We drew on the data set from a multicenter trial that examined a guided Internet intervention (deprexis) for patients with mild to moderate depression. Two hundred twenty-three patients completed the WAI-I and thePatient Satisfaction Questionnaire (ZUF-8) at posttreatment, and the Attitudes toward Psychological Online-Interventions Questionnaire (APOI) at baseline. We ran confirmatory factor analyses (CFA) testing two- and three-factor solutions and calculated Cronbach's α, item-total correlations, and correlations of the WAI-I with APOI and ZUF-8. RESULTS: The results suggested a two-factor solution, with a very good model fit and evidence of factor independency, adequate internal consistency, and external validity for the complete scale and the sub-scales. CONCLUSIONS: The WAI-I showed as a reliable and valid instrument to capture alliance in guided Internet interventions, which might facilitate process-outcome research and treatment development efforts.
RCT Entities:
OBJECTIVE: This study analyses the psychometric properties of the Working Alliance Inventory adapted for guided Internet interventions (WAI-I). METHODS: We drew on the data set from a multicenter trial that examined a guided Internet intervention (deprexis) for patients with mild to moderate depression. Two hundred twenty-three patients completed the WAI-I and the Patient Satisfaction Questionnaire (ZUF-8) at posttreatment, and the Attitudes toward Psychological Online-Interventions Questionnaire (APOI) at baseline. We ran confirmatory factor analyses (CFA) testing two- and three-factor solutions and calculated Cronbach's α, item-total correlations, and correlations of the WAI-I with APOI and ZUF-8. RESULTS: The results suggested a two-factor solution, with a very good model fit and evidence of factor independency, adequate internal consistency, and external validity for the complete scale and the sub-scales. CONCLUSIONS: The WAI-I showed as a reliable and valid instrument to capture alliance in guided Internet interventions, which might facilitate process-outcome research and treatment development efforts.
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