A Randomized Controlled Trial of Animal-Assisted Therapy as an Adjunct to Intensive Family Preservation Services

Specific and Non-specific Factors of Animal-Assisted Interventions Considered in Research: A Systematic Review

Research on animal-assisted interventions (AAIs) has increased massively in the last few years. But it is still not clear how AAIs work and how important the animal is in such interventions. The aim of this systematic review was to compile the existing state of knowledge about the working mechanisms of AAIs. We searched 12 major electronic databases for previous AAI studies with active control groups. Of 2001 records identified, we included 172 studies in the systematic review. We extracted previously published hypotheses about working mechanisms and factors that have been implicitly considered specific or non-specific in AAI research by categorizing control conditions using content analysis. We analyzed the categories using descriptive statistics. We found that 84% of the included studies mentioned a hypothesis of working mechanisms, but 16% did not define specific hypotheses. By analyzing their control conditions, we found that in most controlled studies, the animal or the interaction with the animal was implicitly considered as a specific factor for the effects of the AAI. Non-specific factors such as therapeutic aspects, social interactions, or novelty have also been controlled for. We conclude that AAI research still cannot answer the question of how and why AAIs work. To address this important research gap, we suggest using component studies with innovative control conditions and results from placebo research to address both the specific and non-specific, contextual factors of AAIs to disentangle its mechanisms.

Systematic Review Registration

https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=158103, identifier: CRD42020158103.

Improving Engagement in Behavioral and Mental Health Services Through Animal-Assisted Interventions: A Scoping Review

OBJECTIVE

Client engagement in behavioral and mental health services has been strongly linked to improved outcomes and treatment completion. Animal-assisted interventions (AAIs) are increasingly used to improve client engagement, for example, by involving a dog in therapy to support a client's sense of safety. Although existing research suggests that human-animal interactions may promote engagement, further research is needed to understand the underlying mechanisms, identify procedures needed for treatment fidelity, and determine the populations in which this intervention would be most effective. The aim was to identify the existing knowledge base to inform future research and practice in these areas.

METHODS

A review was conducted using the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews guidelines to answer three questions: What research has been completed regarding the use of animals to affect client engagement, including measurement of potential processes of change? How have interventions that use animals been structured and protocolized? How is engagement operationally defined by these studies?

RESULTS

Ten studies were identified for review. Preliminary evidence indicates that AAIs may support client engagement in behavioral and mental health services. A wide range of conceptualizations in which populations and settings could benefit from AAIs were identified, but it remains unclear who would benefit most. The review did not substantively address the efficacy of AAIs for increasing engagement or factors that may drive engagement.

CONCLUSIONS

Further research is needed to quantify the impact of AAIs on service engagement and to identify mechanisms of change.