Process Evaluation of Animal-Assisted Therapy: Feasibility and Relevance of a Dog-Assisted Therapy Program in Adults with Autism Spectrum Disorder

SIMPLE SUMMARY: An explorative study on the effects of animal-assisted therapy showed reduced stress and improved social communication in adults with autism spectrum disorder (ASD). To examine whether this intervention is suitable for a broader scope of application in clinical practice, we conducted a process evaluation alongside the effect study. The aim of this process evaluation was to gain insight into the quality of the study, the relevance and feasibility of the intervention, and the barriers and facilitators to the implementation of the intervention. Questionnaires, semi-structured interviews, and treatment reports were used to analyze process data in 27 participants who were randomized into the intervention condition and in three therapists. Both the participants and therapists evaluated the animal-assisted therapy program as satisfying, feasible, and relevant for adults with ASD. They reported the following arguments for their positive appraisal of the therapy: the therapy helped improve self-insight, joy, relaxation, and physical contact. The participants’ attitudes, personal skills for generalization, and severity of contextual problems were named as potential barriers to the feasibility of the therapy program. Females and dog owners were over-represented in this study, and therefore, generalization of the previously established effects should be made with caution. However, given the intervention’s effects and the positive evaluation of the program by the participants and therapists alike, animal-assisted therapy can be considered a valuable addition to treatment possibilities for reducing stress and improving social communication in adults with autism spectrum disorder. ABSTRACT: (1) Background: Randomized controlled trials (RCTs) are considered the gold standard for evaluating a treatment. However, the results of an RCT may remain meaningless for clinical practice in cases of poor intervention feasibility or fidelity (the extent to which the protocol was executed), or when health care professionals or patients experience the intervention as irrelevant or unpleasant. Feasibility and relevance of psychosocial interventions are highly understudied in adults with autism spectrum disorder (ASD). In order to put the effects revealed in an RCT on an animal-assisted therapy (AAT) program in adults with autism spectrum disorder (ASD) into the context of clinical practice and to formulate guidelines for potential improvements and further implementation of the therapy, the aim of this process evaluation was to gain insight into the relevance and feasibility of the intervention and barriers and facilitators to its implementation. (2) Methods: Data were collected from 27 participants with ASD and three therapists using questionnaires, semi-structured interviews, and treatment reports. Reach, adherence, program fidelity, and program appraisal were evaluated, and barriers and facilitators to recruitment and implementation of the AAT program were explored. (3) Results: The participants were satisfied with the program and evaluated it as feasible and relevant for adults with ASD. The participants documented improving self-insight, joy, relaxation, and physical contact with a therapy dog as the reason of their positive appraisal of the therapy. Documented aspects that may influence feasibility and appraised relevance were the participants’ therapy attitude, skills for generalization, and severity of contextual problems (e.g., problems at work, relationship problems). Regarding the sample quality, females and dog owners were slightly over-represented in the RCT. (4) Discussion: Considering the positive evaluation of the intervention and its positive effects revealed in the RCT, the AAT program can be added to the treatment repertoire to reduce stress and improve social communication in adults with ASD. More research in larger samples is needed for better understanding the generalization of the intervention effects, especially in male patients and those who do not have a dog at home.