Dr. zane has been studying monkeys' ability to classify photographs of cats and dogs. after the monkeys became competent at this classifying task, dr. zane found that certain of their frontal lobe neurons fired in response to new "catlike" or "doglike" images. this suggests that the monkeys: can form concepts. are smarter than 3-year-old children. have the ability to form syntax. are not prone to fixation.

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is: