Yale Study, Stability shuts down the learning centers of the brain.— Kiran Johny (@johnywrites) August 14, 2018
In an initial experiment, monkeys were given choice between hitting a red target which provided rewards 80% of the time and a green target that paid off 20% of the time.
The monkeys quickly learned it was more profitable to hit the red target, so scientists increased uncertainty by switching things and making the green target more profitable.
In a second experiment, they introduced stability, an orange button always paid off 80% of the time and a blue button always paid off 20% of the time.
As a result of the stability of rewards, the monkeys stopped learning, and brain activity related to learning in the frontal cortex was dramatically reduced.