Giorgio A Tasca1, Christine Cabrera2, Elizabeth Kristjansson2, Rebecca MacNair-Semands3, Anthony S Joyce4, John S Ogrodniczuk5. 1. a Department of Psychology , The Ottawa Hospital - General Campus , Ottawa , ON , Canada. 2. b Department of Psychology , University of Ottawa , Ottawa , ON , Canada. 3. c Department of Psychology , University of North Carolina at Charlotte , Charlotte , NC , USA. 4. d Department of Psychiatry , University of Alberta , Edmonton , AB , Canada. 5. e Department of Psychiatry , University of British Columbia , Vancouver , BC , Canada.
Abstract
OBJECTIVE: We tested a very brief version of the 23-item Therapeutic Factors Inventory-Short Form (TFI-S), and describe the use of Item Response Theory (IRT) for the purpose of developing short and reliable scales for group psychotherapy. METHOD: Group therapy patients (N = 578) completed the TFI-S on one occasion, and their data were used for the IRT analysis. Of those, 304 completed the TFI-S and other measures on more than one occasion to assess sensitivity to change, concurrent, and predictive validity of the brief version. RESULTS: Results suggest that the new TFI-8 is a brief, reliable, and valid measure of a higher-order group therapeutic factor. CONCLUSION: The TFI-8 may be used for continuous process measurement and feedback to improve the functioning of therapy groups.
OBJECTIVE: We tested a very brief version of the 23-item Therapeutic Factors Inventory-Short Form (TFI-S), and describe the use of Item Response Theory (IRT) for the purpose of developing short and reliable scales for group psychotherapy. METHOD: Group therapy patients (N = 578) completed the TFI-S on one occasion, and their data were used for the IRT analysis. Of those, 304 completed the TFI-S and other measures on more than one occasion to assess sensitivity to change, concurrent, and predictive validity of the brief version. RESULTS: Results suggest that the new TFI-8 is a brief, reliable, and valid measure of a higher-order group therapeutic factor. CONCLUSION: The TFI-8 may be used for continuous process measurement and feedback to improve the functioning of therapy groups.
Entities:
Keywords:
group psychotherapy; item response theory; statistical methodology; test development; therapeutic factors
Authors: Giulia Landi; Elena Simoni; Isotta Landi; Gian Maria Galeazzi; Maria Moscara; Marcella Pighi; Paola Ferri; Rosaria Di Lorenzo Journal: Psychiatr Q Date: 2021-06