When madison visits her grandparents' house, she runs straight to grandma and gives her a hug. then, grandma takes madison to the kitchen and gives her a freshly-baked cookie. over time, madison learns that hugging grandma usually leads straight to cookies so she hugs grandma often. this is an example of which principle of learning?

The answer is law of effect.

Explanation:

This concept explains that actions with positive consequences (rewards) are  more likely to be repeated. Just the same, actions with negative consequences are less likely to occur again.

These findings had a considerable influence on the development of behaviorism. Both theories have since then been used by health and psychology professionals as a therapeutic method.