Rates of reinforcement and measures of compliance in free and protected contact elephant management systems
Abstract
Protected contact is an alternative to traditional captive elephant training techniques that emerged as a result of concerns for animal welfare and personnel safety. The present study documented the behavior of elephants and their animal care professionals to determine rates of reinforcement and measures of compliance under two handling systems. Behavioral data were collected from animal care professionals and elephants during the elephants' baths in both free contact (FC) and protected contact (PC). Positive reinforcement, in the form of food, was delivered, on average, nearly eight times more frequently in the PC condition. Further, the mean rate at which the animal care professionals used the ankus in the FC condition as negative reinforcement was similar to the mean rate at which they provided positive reinforcement to the elephants in the FC condition. Latencies between verbal commands and the elephants' behaviors demonstrated an inconsistent pattern, but were generally longer in the PC condition. The mean percent of "refusals" by the elephants was higher for most behaviors across elephants in the PC condition. The findings suggest that animal care professionals did not heavily rely on positive reinforcement in the FC condition to elicit desired behaviors from the elephants, but this was the case in the PC condition. We propose that longer latencies and higher mean percent of refusals by the elephants may indicate that they were exercising choice or control over their environment, which has been associated with improved well-being. Additional studies of this kind are needed to enable other institutions to make informed decisions about elephant management and welfare.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Bullhook use presents serious challenges to the safety and well-being of both elephants and keepers.
“their use presents serious challenges to the safety and well-being of both elephants and keepers”
From Continuing challenges of elephant captivity: the captive environment, health issues, and welfare implications (2024) · cites this paper as Wilson et al., 2015
Cites
Observational study of behavior: sampling methods
Altmann, J. (1974) · Behaviour · doi:10.1163/156853974x00534 · Cited by 13,891 · see citing works
Housing, Care and Psychological Well-Being of Captive and Laboratory Primates
Segal, E. F. (1990) · Cited by 321 · see citing works
Controllability and predictability in acquired motivation
Mineka, S., & Hendersen, R. W. (1985) · Annual Review of Psychology · doi:10.1146/annurev.ps.36.020185.002431 · Cited by 234 · see citing works
The effects of control over high intensity noise on plasma cortisol levels in rhesus monkeys
Hanson, J. D., Larson, M. E., & Snowdon, C. T. (1976) · Behavioral Biology · doi:10.1016/s0091-6773(76)91460-7 · Cited by 170 · see citing works
Positive interactions lead to lasting positive memories in horses, Equus caballus
Sankey, C., Richard‐Yris, M., Leroy, H., Henry, S., & Hausberger, M. (2010) · Animal Behaviour · doi:10.1016/j.anbehav.2009.12.037 · Cited by 142 · see citing works
Maple, T. L., & Perdue, B. M. (2013) · Animal welfare · doi:10.1007/978-3-642-35955-2 · Cited by 126 · see citing works
Patton, M. L., Swaisgood, R. R., Czekala, N. M., White, A. M., Fetter, G. A., Montagne, J. P., Rieches, R. G., & Lance, V. A. (1999) · Zoo Biology · doi:10.1002/(sici)1098-2361(1999)18:2 · Cited by 118 · see citing works
Reinforcement as a mediator of the perception of humans by horses (Equus caballus)
Sankey, C., Richard‐Yris, M., Henry, S., Fureix, C., Nassur, F., & Hausberger, M. (2010) · Animal Cognition · doi:10.1007/s10071-010-0326-9 · Cited by 106 · see citing works
Innes, L., & McBride, S. D. (2007) · Applied Animal Behaviour Science · doi:10.1016/j.applanim.2007.08.011 · Cited by 96 · see citing works
Using training to moderate chimpanzee aggression during feeding
Bloomsmith, M. A., Laule, G., Alford, P. L., & Thurston, R. H. (1994) · Zoo Biology · doi:10.1002/zoo.1430130605 · Cited by 94 · see citing works
Training is enrichment—And beyond
Westlund, K. (2013) · Applied Animal Behaviour Science · doi:10.1016/j.applanim.2013.12.009 · Cited by 84 · see citing works
Use of positive reinforcement training in the management of species for reproduction
Desmond, T., & Laule, G. (1994) · Zoo Biology · doi:10.1002/zoo.1430130509 · Cited by 71 · see citing works
The implications of husbandry training on zoo animal response rates
Ward, S. J., & Melfi, V. A. (2013) · Applied Animal Behaviour Science · doi:10.1016/j.applanim.2013.05.008 · Cited by 70 · see citing works
The use of positive reinforcement training to reduce stereotypic behavior in rhesus macaques
Coleman, K., & Maier, A. (2010) · Applied Animal Behaviour Science · doi:10.1016/j.applanim.2010.02.008 · Cited by 69 · see citing works
A preliminary study of the behavioral effects of feeding enrichment on African elephants
Stoinski, T. S., Daniel, E., & Maple, T. L. (2000) · Zoo Biology · doi:10.1002/1098-2361(2000)19:6 · Cited by 66 · see citing works
Training to reliably obtain blood and urine samples from a diabetic chimpanzee (Pan troglodytes)
Laule, G., Thurston, R. H., Alford, P. L., & Bloomsmith, M. A. (1996) · Zoo Biology · doi:10.1002/(sici)1098-2361(1996)15:6 · Cited by 62 · see citing works
Nocturnal behavior in a group of female African elephants
Wilson, M. L., Bashaw, M. J., Fountain, K., Kieschnick, S., & Maple, T. L. (2006) · Zoo Biology · doi:10.1002/zoo.20084 · Cited by 61 · see citing works
Perdue, B. M., Evans, T. A., Washburn, D. A., Rumbaugh, D. M., & Beran, M. J. (2014) · Learning & Behavior · doi:10.3758/s13420-014-0135-0 · Cited by 57 · see citing works
(2008) · Cited by 56 · see citing works
Perceived control in rhesus monkeys (Macaca mulatta): Enhanced video-task performance.
Washburn, D. A., Hopkins, W. D., & Rumbaugh, D. M. (1991) · Journal of Experimental Psychology Animal Behavior Processes · doi:10.1037//0097-7403.17.2.123 · Cited by 54 · see citing works
Conditioning of nyala (Tragelaphus angasi) to blood sampling in a crate with positive reinforcement
Grandin, T., Rooney, M. B., Phillips, M. M., Cambre, R. C., Irlbeck, N. A., & Graffam, W. (1995) · Zoo Biology · doi:10.1002/zoo.1430140307 · Cited by 51 · see citing works
Influence of housing conditions on pregnancy outcome in cynomolgus monkeys (Macaca fascicularis)
Boot, R., Leussink, A. B., & Vlug, R. (1985) · Laboratory Animals · doi:10.1258/002367785780890703 · Cited by 39 · see citing works
(2013) · Choice Reviews Online · doi:10.5860/choice.51-1497 · Cited by 34 · see citing works
Perceived control in rhesus monkeys (Macaca mulatta): Enhanced video-task performance.
Washburn, D. A., Hopkins, W. D., & Rumbaugh, D. M. (1991) · Journal of Experimental Psychology Animal Behavior Processes · doi:10.1037/0097-7403.17.2.123 · Cited by 33 · see citing works
Wilson, M., Bloomsmith, M. A., & Maple, T. L. (2004) · Animal Welfare · doi:10.1017/s0962728600026646 · Cited by 32 · see citing works
Bloomsmith, M. A., Jones, M. L., Snyder, R. J., Singer, R., Gardner, W., Liu, S. C., & Maple, T. L. (2003) · Zoo Biology · doi:10.1002/zoo.10103 · Cited by 29 · see citing works
Technical note: Urine collection from vervet monkeys by instrumental conditioning
Kelley, T. M., & Bramblett, C. A. (1981) · American Journal of Primatology · doi:10.1002/ajp.1350010112 · Cited by 21 · see citing works
Taylor (1998) · doi:10.1002/(sici)1098-2361(1998)17:4
Flagged first, then by citations
Cited by
Sorted by citations
Elephant tourism in Thailand: a review of animal welfare practices and needs
Bansiddhi, P., Brown, J. L., Thitaram, C., Punyapornwithaya, V., & Nganvongpanit, K. (2020) · Journal of Applied Animal Welfare Science · doi:10.1080/10888705.2019.1569522 · Cited by 65 · see citing works
Welfare assessment and activities of captive elephants in Thailand
Bansiddhi, P., Brown, J. L., & Thitaram, C. (2020) · Animals · doi:10.3390/ani10060919 · Cited by 52 · see citing works
Brando, S. I. C. A., & Norman, M. (2023) · Animals · doi:10.3390/ani13142247 · Cited by 48 · see citing works
Moving toward Fear-Free Husbandry and Veterinary Care for Horses
Carroll, S. L., Sykes, B. W., & Mills, P. C. (2022) · Animals · doi:10.3390/ani12212907 · Cited by 30 · see citing works
Applied behavior analysis and the zoo: Forthman and Ogden (1992) thirty years later
Fernandez, E. J., & Martin, A. L. (2022) · Journal of Applied Behavior Analysis · doi:10.1002/jaba.969 · Cited by 25 · see citing works
Facilitating the social behaviour of bull elephants in zoos
Hartley, M., Wood, A., & Yon, L. (2019) · International Zoo Yearbook · doi:10.1111/izy.12245 · Cited by 24 · see citing works
Allard, S. M., & Bashaw, M. J. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108183147.010 · Cited by 16 · see citing works
The historical development of zoo elephant survivorship
Scherer, L., Bingaman Lackey, L., Clauss, M., Gries, K., Hagan, D., Lawrenz, A., Müller, D. W. H., Roller, M., Schiffmann, C., & Oerke, A. (2023) · Zoo Biology · doi:10.1002/zoo.21733 · Cited by 15 · see citing works
“For female African elephants, a higher sensitivity for ovarian cycle problems than in Asian elephants was detected (Brown et al., 2016; Oerke et al., 2002), pointing toward a generally more sensitive nature of this species.”
BackgroundDoyle, C., Rally, H., O’Brien, L., Tennison, M., Marino, L., & Jacobs, B. (2024) · PeerJ · doi:10.7717/peerj.18161 · Cited by 14 · see citing works
de Mori, B., Stagni, E., Ferrante, L., Vogt, G., Ramsay, K., & Normando, S. (2019) · Animals · doi:10.3390/ani9100831 · Cited by 7 · see citing works
Grant, R. A., Ryan, H., & Breakell, V. (2022) · Journal of Neuroscience Methods · doi:10.1016/j.jneumeth.2022.109752 · Cited by 6 · see citing works
Hambrecht, S., Oerke, A.-K., Heistermann, M., Hartig, J., & Dierkes, P. (2021) · Animals · doi:10.3390/ani11123525 · Cited by 5 · see citing works
Asian elephant calf physiology and mahout perspectives during taming in Myanmar
Crawley, J. A. H., Nandar, H., Zaw, H. T., Lahdenperä, M., dos Santos, D. J. F., Seltmann, M. W., Brown, J. L., Goodsell, R. M., Oo, Z. M., Htut, W., et al. (2024) · Royal Society Open Science · doi:10.1098/rsos.231172 · Cited by 5 · see citing works
Lacinak, A. M. (2024) · Animals · doi:10.3390/ani14060923 · Cited by 5 · see citing works
Weston, M., Mills, K., & von Keyserlingk, M. (2021) · Animal Welfare · doi:10.7120/09627286.30.3.005 · Cited by 3 · see citing works
Armstrong, S. R., & Johnson, B. (2021) · Journal of Zoological and Botanical Gardens · doi:10.3390/jzbg2030035 · Cited by 3 · see citing works
Applied Behavior Analysis and the Zoo: Forthman and Ogden (1992) Thirty Years LaterPreprint
Fernandez, E. J., & Martin, A. (2022) · Preprints.org · doi:10.20944/preprints202211.0280.v1 · Cited by 1 · see citing works
(2020) · Elsevier eBooks · doi:10.1016/b978-0-12-816208-8.00022-1
Hill, K. (2024) · Animal Behaviour and Welfare Cases · doi:10.1079/abwcases.2024.0018
Ross, N. (2025) · Animal Behaviour and Welfare Cases · doi:10.1079/abwcases.2025.0013
Perceptions of Elephants’ Labor and Autonomy in Zoos
Lacinak, A. M. (2025) · Animals · doi:10.3390/ani15233410
A Longitudinal Exploration of Protected Contact and Positive Reinforcement Training in Elephants
Wilson, M. L., Kelling, A. S., & Perdue, B. M. (2026) · Zoo Biology · doi:10.1002/zoo.70050 · Cited by 1 · see citing works
Animal–Visitor Interactions: Where Do We Go from Here?
Fernandez, E. J., Martinez, C., Brereton, J. E., & Moss, A. (2026) · Animals · doi:10.3390/ani16193035
- Authors
- Wilson, M. L., Perdue, B. M., Bloomsmith, M. A., & Maple, T. L.
- Affiliations
- Georgia State University (US)
- Agnes Scott College (US)
- Emory National Primate Research Center (US)
- Florida Atlantic University (US)
- Corresponding author
- Wilson, Megan L.
- Venue
- Zoo Biology
- Publisher
- Wiley
- Published
- 2015-07-14
- Volume
- 34
- Issue
- 5
- Pages
- 431-437
- ISSN
- 0733-3188 (ISSN-L)
- 1098-2361
- OpenAlex
- W1901008107
- Cited by
- 24
- References
- 27
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 4 · 2023: 1 · 2022: 5 · 2021: 3 · 2020: 3 · 2019: 3 · 2018: 1
- FWCI
- 0.54
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Zoo Biology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Elizabeth Smithgall-Watts endowment
- Zoo Atlanta's Charles Bailey foundation
- Topics
- Health Sciences › Veterinary › Small Animals › Animal Behavior and Welfare Studies
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Human-Animal Interaction Studies
- Social Sciences › Psychology › Developmental and Educational Psychology › Behavioral and Psychological Studies
- Keywords
- captive elephants, positive reinforcement, negative reinforcement, reinforcement rate, compliance, refusal behavior, animal welfare, zoo animal management
- MeSH terms
- Animals, Animal Husbandry, Animal Welfare, Animals, Zoo, Behavior, Animal, Elephants, Female, Humans, Male, Reinforcement, Psychology
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review