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In MacLean, Merritt, and Brannon’s research experiment on lemurs, subjects were given a reinforcer provided they chose the higher ranking item in a pair. Given that A>B, B>C, C>D, D>E, and E>F, then how did a ring-tailed lemur (a social animal) respond when asked to choose between B and F?

Which of the following is NOT an example of communication?

When mongoose lemurs make discriminations among various amounts of items, they seem to do it based on _____ rather than by  _____.

Which of the following cognitive skills is required in order to intentionally deceive others?

In most cross-fostering experiments, chimps were taught:​

After training Chaser to learn the names of a variety of items, it became possible to determine that she could group items based on their features. Which of the following terms refers to this process?

Which of the following is a topic studied under comparative cognition?

In a directed forgetting procedure, a _____ is presented during the _____ period.

Results of the artificial language experiments conducted on chimps strongly suggest that many of the chimps had mastered _____, but there is less evidence that they had mastered  _____.

Which of the following cognitive tasks is most DIFFICULT for adult chimpanzees?