Tina has a heavy class load and is spending a lot of time studying, to the dismay of her beloved dog, bobo. when bobo walks over and puts his chin on tina's leg, she pets him and gives him a treat from the bag she keeps in her desk drawer. as a consequence, he continues walking over and putting his chin on tina's leg. tina

Here is the full question: Tina has a heavy class load and is spending a lot of time studying, to the dismay of her beloved dog, bobo. When bobo walks over and puts his chin on Tina's leg, she lets him and gives him a treat from the bag she keeps in her desk drawer. As a consequence, he continues walking over and putting his chin on Tina's leg. Tina has used .

The answer is positive reinforcement.

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