Animal-assisted therapy improves social behavior in patients with brain injuries

After a severe traumatic brain injury, patients often exhibit problems in their social behavior. For instance, they may suffer from reduced emotional empathy and show impaired emotional expression, all contributing to communicative problems in social interactions.

Stimulating engagement and motivation

Animal-assisted therapy is increasingly being used in rehabilitation in order to improve these deficits in patients’ social competence. Integrating animals into therapy can, for example, stimulate patient engagement and motivation. In collaboration with REHAB Basel, the clinic for neurorehabilitation and paraplegiology, and the Swiss Tropical and Public Health Institute, researchers in the Faculty of Psychology at the University of Basel have now undertaken the first systematic study on in-patients with acquired brain injury to assess the effectiveness of this therapy method.

The study involved conducting animal-assisted therapy sessions for 19 adult participants alongside conventional therapy sessions. The patients’ social behavior were recorded and evaluated during over 200 animal-assisted and conventional therapy sessions. The study also documented patient mood and satisfaction and their treatment motivation – an important criterion in therapeutic success.

More positive emotions

The results showed that in the presence of an animal – which included guinea pigs, miniature pigs, rabbits and sheep – patients exhibited more active social engagement than during the conventional therapy sessions. They expressed nearly twice as many positive emotions and communicated more frequently both verbally and non-verbally. The animal-assisted therapy had no effect on negative emotions, such as rage or anger. If an animal was present during the therapy session, patients considered themselves more satisfied and their motivation to actively participate in the therapy higher; this was congruent with the assessments of the therapists.

“The results suggest that animal-assisted therapy can have a positive effect on the social behavior of patients with brain injuries,” concluded the study’s principal investigator, Dr. Karin Hediger from the University of Basel.

“Animals can be relevant therapeutic partners, because they motivate patients to care for the animal. Secondly, animals provide a stimulus for patients to actively engage in the therapeutic activities.” Thus, animal-assisted therapy may be a promising supplement to conventional neurorehabilitation, says the psychologist.

contact for scientific information:
Dr. Karin Hediger, University of Basel, Faculty of Psychology, Clinical Psychology and Psychotherapy, Tel. +41 79 519 78 85, Email:

Prof. Dr. Jens Gaab, University of Basel, Faculty of Psychology, Clinical Psychology and Psychotherapy, Tel. +41 61 207 07 48, Email:

original publication:
Karin Hediger, Stefan Thommen, Cora Wagner, Jens Gaab, Margret Hund-Georgiadis
Effects of animal-assisted therapy on social behaviour in patients with acquired brain injury: a randomised controlled trial
Scientific Reports (2019), doi: 10.1038/s41598-019-42280-0

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