Animal Visitation Program (AVP) Reduces Cortisol Levels of University Students: A Randomized Controlled Trial

University students report high levels of stress. Although causal work is limited, one popular approach to promote stress relief is animal visitation programs (AVPs). We conducted a randomized trial (N = 249) examining effects of a 10-minute AVP on students' salivary cortisol levels. Undergraduate students were randomly assigned to one of four conditions: hands-on AVP (petting cats and dogs; n = 73), AVP observation (watching others pet animals; n = 62), AVP slideshow (viewing images of same animals; n = 57), or AVP waitlist (n = 57). Participants collected salivary cortisol upon waking, and two samples were collected 15 and 25 minutes after the 10-minute condition, reflecting cortisol levels at the beginning and end of the intervention. Controlling for students' basal cortisol, time awake, and circadian pattern, students in the hands-on condition had lower posttest cortisol compared to slideshow (beta = .150, p = .046), waitlist (beta = .152, p = .033), and observation (beta = .164, p = .040). A 10-minute college-based AVP providing hands-on petting of cats and dogs provides momentary stress relief.