Indeed, the experiments described in this piece seem to be testing whether the apes and monkeys have the same sort of reactions that humans do.

FORBES: I Do Wish The Scientists Would At Least Try To Understand Economics

Birds, however, are remotely related to humans, and even monkeys are not as close as apes.

ECONOMIST: Evolution

Baboons and chimpanzees both belong to which of these groups: apes, monkeys, or primates?

CNN: Newsquiz: Week of January 21