The most striking behavioral outcome of Down syndrome is

B. F. Skinner was a radical behaviorist who refused to

a. conduct research with animals other than humans. b. believe that observation tells us anything about human nature. c. understand how it was possible for people to change. d. accept that individuals can change over time. e. speculate about what happens inside an organism.

Based on epidemiological research, which of the following groups experiences obsessive-compulsive disorder at a rate that is higher than

the general population? a) young females b) upper-income individuals c) individuals with low socioeconomic status d) individuals with less than a high school education