The GTFS is a measure developed by Fogarty et al. (2015, 2016, 2019a, 2019b) that has been demonstrated to have scientifically robust content validity, face validity, criterion validity and reliability (Fogarty et al., 2019a). There are many ways to develop a fidelity scale for treatment adherence. The choices made in developing the GTFS were made under the supervision of a professor of psychology with extensive experience in scale development. The research used to develop the GTFS was then reviewed by, and accepted for publication in, the leading academic journal in the field, Psychotherapy Research (PR). This is the first time that an article about Gestalt therapy (GT) has ever been published in that journal; esteemed Gestalt colleagues have previously published in PR, but have not been able to refer to the modality as Gestalt (because of the lack of a scientific basis for Gestalt). So Hosemans’ claim that the GTFS is ‘a seemingly invalid, unreliable, and ineffective scale’ is both at odds with the views of the academic reviewers for PR; and, as the word ‘seemingly’ betrays, an assertion based on conjecture. It would take scientific research to determine whether and how the GTFS might be improved to reflect more holistically the phenomenological foundations of GT.
Cet article traite d’un travail d’évaluation de l’efficacité de la Gestalt-thérapie et en présente le processus. Un consensus a émergé au sein de la communauté gestaltiste pour définir ce qui est propre à la GT à travers une « échelle de fidélité » afin de préciser les caractéristiques de son approche. Un premier version de l’échelle de fidélité (GTFS) sera soumise à une étude pilote puis des études de validation seront menées dans différents pays, utilisant des vidéos en situation réelle. C’est donc par séries de différentes étapes d’examen/analyses/réponses, que cette étude procède. L’échelle de validation semble emporter l’adhésion des différents groupes nationaux et ils en retirent une meilleure compréhension de leur pratique. La GTFS permet de mieux percevoir les caractéristiques propres de cette approche thérapeutique, entrainant de facto l'intérêt pour la pratique clinique et la formation en Gestalt-Thérapie.
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