What it is that Gestalt therapists do in the clinic that is different from other therapists? What is it, in other words, that makes Gestalt Therapy Gestalt, and distinguishes it from other psychotherapeutic modalities? This article describes the process of finding an expert consensus about these questions as part of the process of developing a "fidelity scale" for Gestalt therapy. Using a Delphi study, eight key concepts that characterize Gestalt therapy were identified, together with the therapist behaviours that reflect those concepts.
Keywords: Gestalt, fidelity scale, Delphi study, developing awareness, working relationally, working in the here and now, phenomenological practice, working with embodiment, field sensitive practice, contacting processes, experimental attitude.