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. Author manuscript; available in PMC: 2019 May 10.
Published in final edited form as: Appl Dev Sci. 2017 Feb 23;21(3):200–216. doi: 10.1080/10888691.2016.1243988

Table 2:

Overview of animal-assisted intervention (AAI) characteristics, categorized by species and sorted by sample size

First Author (Year) N Terminology Setting Ratio
(Personnel:
Participants: Animals)
Animal/Handler
Certification
Dose
Program duration
(weeks)
Session frequency (per week) Session length
(minutes)
Total contact time (hours)
HORSES

Gabriels (2015) 116 Therapeutic horseback riding Riding center 2:1:1 PATH 10 1 45 7.5
Borgi (2015) 28 Equine-assisted therapy Riding center 2:3:3 FISE 25 1 65 27.1
Steiner (2015) 26 Therapeutic horse riding Riding center 4:1:1 - 4 1 30 2.0
Lanning (2014) 25 Equine-assisted activities Riding center 4:1:1 PATH 12 1 60 12.0
Ward (2013) 21 Therapeutic horseback riding Riding center 4:1:1 PATH 30 1 60 18.0
Garcia-Gomez (2014) 16 Therapeutic horse riding Riding center 1:4:4 PATH 12 2 45 18.0
Tabares (2012) 8 Hippotherapy Riding center 1:1:1 AZE 4 1 30 2.0
Ajzenman (2013) 7 Hippotherapy Riding center 1:3:3 PATH 12 1 45 9.0
Jenkins (2013) 7 Therapeutic horseback riding Riding center 4:1:1 PATH 9 1 40 6.0
Ghorban (2013) 6 Therapeutic horseback riding Riding center 3:2:2 - 4 2 45 6.0
Chen (2015) 4 Equine-assisted activity Riding center -:1:1 - 1 1 1 0.0
Holm (2014) 3 Therapeutic horseback riding Riding center 4:1:1 PACTH, NARHA 12 2 30–45 12.5
DOGS

Fung (2014) 10 Therapy dog School 1:1:2 ASA 7 3 20 6.7
Grigore (2014) 3 Animal-assisted therapy Treatment center 2:1:1 RAAATA 10 3 15 2.5
Stevenson (2015) 3 Sessions with a dog School 2:1:1 - 10 1 20 1.7
Funahashi (2014) 2 Animal-assisted activities Laboratory 1:1:3 - 28 <1 35 2.3
Fung (2015) 1 Animal-assisted play therapy School 1:1:1 ASA 5 3 20 4.7
GUINEA PIGS

O’Haire (2015) 99 Animal-assisted activities School 1:3:2 - 8 2 20 5.3
O’Haire (2014) 64 Animal-assisted activities School 1:3:2 - 8 2 20 5.3
O’Haire (2013) 33 Animal-assisted activities School 1:3:2 - 8 2 20 5.3
DOLPHINS

MdYusof (2012) 15 Dolphin-assisted therapy Dolphin center 3:15:1 - 52 1 75 65.0
Salgueiro (2012) 10 Dolphin interaction Dolphin center 2:1:1 - 12 1 15 3.0

Notes: Information is reported for the animal-assisted intervention (AAI) condition only, not any control/comparison conditions. Session frequency is the average number of sessions per week, rounded to the nearest whole number. - = not reported, ASA = Animal Asia Foundation, RAAATA = Romanian Association of Animal-Assisted Therapy and Activities, PATH = Professional Association of Therapeutic Horsemanship, FISE = Italian Equestrian Federation, PACTH = Pennsylvania Council on Therapeutic Horsemanship, NARHA = North American Riding for the Handicapped Association, AZE = Association of Zootherapy of Extremadura