Chimpanzee cooperative health positive reinforcement



http://www.chimpsanctuarynw.org/blog/2015/05/negra-building-trust-and-hoot-tonight

I learned very early on that Negra does not like to be touched. It is likely that she had several negative experiences in the lab, literally being poked and prodded, and so even a gentle knuckle rub would make her scream and run away. After some time, though, she would occasionally ask for a knuckle rub by offering her back to her caregivers. I remember the first time I gave Negra a knuckle rub I was almost in tears, just thinking about how long it took her to realize that she was safe here—and I would not hurt her.

Honestly, I’m not sure that she’s completely convinced of that fact. Just due to the sheer horror of her past, she has not fully moved on from those nightmares. Every once-in-a-while, something will startle Negra and the PTSD symptoms come through. As we started working on positive reinforcement training a little over a month ago, Negra was not thrilled with the sound of the clicker. Something about that sound associated a bad memory for her, and she did not react very well at first. However, we were able to muffle the clicker sound by placing it in our pockets, and that seemed to work just fine. (And now she is fine without the muffle!) The next step was getting her comfortable with the target—the PVC tubes we use also were not very comfortable for her at first. After a few sessions though, she became more used to it, and realized that getting grapes and chow were totally worth touching that stupid stick. ;)

Ultimately, the positive reinforcement training is something that will be really incredible for Negra. We will be able to work up to a point where we can perform stress-free medical checks. And, if we ever needed to anesthetize her for any reason, we will be able to do so without any trauma, because she will have learned that presenting her shoulder for a poke results in a positive experience.

Since trust doesn’t come easy for her, and since she prefers routine over new things, I was worried that as her primary trainer, I would not be Negra’s biggest fan. However, I completely miscalculated how things would go. Instead of causing a strain on our relationship, training has made our friendship so much stronger. She has impressed me so much with her progress in our sessions, and I couldn’t be more proud of her. What I thought would take months, she has accomplished in just a few weeks. Negra not only confidently touches the target wherever I place it, but she also has started opening her mouth (a useful behavior for dental checks) and she is even presenting her shoulder. Even since this video was taken, she has become more reliable with the behaviors and is very comfortable with me touching her shoulder!


Post time: Jun-19-2017
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