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Therapeutic Aspects of the Human-Companion Animal Interaction: Page 2 of 3

Therapeutic Aspects of the Human-Companion Animal Interaction: Page 2 of 3

Such findings have also been reported for adults. Katcher et al. (1984) reported reduced blood pressure levels for adults watching an aquarium. Others have addressed the positive influence of animals in acute care settings, nursing homes and rehabilitation settings, as well as in psychiatric settings (Barba, 1995; Brickel, 1980; Voelker, 1995). In nursing homes, residents have been found to be less depressed following animal visits (Francis et al., 1985). Patients hospitalized on a psychiatric service have been found to have better group attendance and fewer psychiatric symptoms when caged birds are present (Beck et al., 1986), and increased positive socialization has been found for Alzheimer's patients when a dog was present (Batson et al., 1995).

Animal-Assisted Therapy (AAT)

While receiving heightened media attention in recent years, AAT can be traced back to at least the 18th century when hippotherapy, or therapeutic horseback riding, was used as a medical intervention for improving postural control, joint disturbance, coordination and basic balance (Depauw, 1983). In addition to these physical benefits, hippotherapy has also been noted to improve feelings of self-worth and power as patients are freed from the mechanical supports of wheelchairs and crutches, and are able to move about on a powerful animal (Blue, 1986). Today, horses are also used in psychotherapy to assist patients in improving ego strength, self-confidence and social competence (Schneidhacker, 1994).

An early report of the potential of AAT in mental health care was provided by Boris Levinson, M.D., a Canadian child psychiatrist who included his dog in therapy sessions (1962). Based on his observations of the interaction between his child patients and the dog during therapy sessions, he reported that the dog served as a communication link, provided the child with a sense of security in the therapy setting and quickened the therapy process. Levinson found that AAT worked well with children who were nonverbal, inhibited, autistic, schizophrenic, withdrawn, obsessive-compulsive or culturally disadvantaged. He found the dog particularly beneficial in helping to strengthen autistic children's contact with reality. A more recent and controlled study of autistic children and AAT reported increased social response by children to both animal and therapist (Campbell and Katcher, 1992).

An AAT/nature education program was found to be therapeutic for children in residential treatment for attention-deficit/hyperactive and conduct disorders (Katcher and Wilkins, 1994). The results of this controlled study indicated the AAT program was effective in decreasing agitated and aggressive behavior, improving cooperation with instructors, engaging students in learning, and in improving behavioral control in regular classrooms.

Others have also addressed the potential therapeutic role of companion animals with other psychiatric populations such as those with dissociative disorders, Alzheimer's disease, dementia and other chronic mental illnesses (Arnold, 1995; Corson and Corson, 1978; Fritz et al., 1995; Hundley, 1991). The role of companion animals in psychotherapy, and their ability to serve as a clinical bridge, has also been described by Barker et al. (1997), Draper et al. (1990) and Mallon (1992). Based on clinical observations, such authors assert the ability of companion animals to demonstrate acceptance by allowing themselves to be petted, to reduce the threat of the therapy setting by their presence, and to serve as a distraction while patients discuss painful material.

A recent study documented the anxiolytic effect of animal-assisted therapy with hospitalized psychiatry patients (Barker and Dawson, 1998). Using a controlled, cross-over design, the researchers compared patients' anxiety levels following AAT and following traditional therapeutic recreation (TR) activities. Results revealed significant reductions in anxiety following AAT for patients with mood disorders, psychotic disorders and other disorders. For the comparison group, only patients with mood disorders showed significant reductions in anxiety. Interestingly, the reduction in anxiety levels for the psychotic patients following AAT was twice as great as that found following TR. The researchers speculate that AAT may be less threatening than traditional group activities, that the physical contact such as hugging and petting the dog may result in the same physiological and psychological reductions in stress that have been reported for nonclinical populations, and that the dog may serve as an entertaining distraction.

Although the majority of published studies of AAT involve dogs, other species have been noted to have beneficial effects as well. Several studies have noted the positive effect for mentally challenged children interacting with marine animals. Benefits of interacting with rehabilitated dolphins, sea turtles and fish were reported by Klingel (1993) to include progress toward, and attainment of, treatment goals and improved self-concept, as well as enjoyable recreational experiences. Nathanson and de Faria (1991) studied the orienting nonverbal and verbal responses of children with mental disabilities interacting in water with dolphins or in water with favorite toys away from dolphins. They report more significant improvements in hierarchical cognitive responses when children interacted with the dolphin. They also note the dolphin interaction produced both a greater number and higher level of responses than the interactions without the dolphins.

Summary

As with any new field of inquiry, initial reports of the benefits of interacting with companion animals were primarily anecdotal or case reports. Based on such reports, studies of efficacy that often involved small sample sizes and a lack of controls were undertaken. As evidence has continued to accumulate, more rigorous controlled studies are being conducted, resulting in the emergence of a significant body of literature supporting the therapeutic value of the human-companion animal interaction in specific circumstances. However, more research is needed-particularly well-designed outcome studies of AAT programs and longitudinal studies of pet ownership-in order to increase our understanding of the human-companion animal interaction and the potential benefits to quality of life.

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