Kyoto, Japan -- "We feel sorry because we cry ... "but not the other way around." In other words, the monkeys were more likely to make pessimistic judgments -- avoiding the gray button ...

We're all familiar with Pavlovian conditioning, in which a reward-anticipatory behavior follows a reward-predicting stimulus.

the Iwatayama Monkey Park is one of the best places around Kyoto to spot the Japanese macaques. There is an entrance fee of approximately $5 USD per person to visit the park. But you’ll get to ...