When researchers tried to videotape behavior and have people who didn't know participants code their behavior, they did not find evidence for genetic influences on traits

Which of the following did NOT occur in the late 1960s and throughout the 1970s in the United States?

A. Young people began to distrust the government's messages about marijuana. B. Grassroots groups such as NORML advocated for changes in laws. C. The American Medical Association recommended the decriminalization of marijuana for personal use. D. Marijuana use among high school students reached an all-time low.

Why do most 6-year-old violinists play worse at a recital than at a rehearsal?

(a) they are much more concerned about criticism at a rehearsal (b) the mere presence of other people has a substantial effect on behavior (c) the violin teacher is much more supportive at a rehearsal (d) the parents of the 6-year-old are more likely to punish poor playing at a recital than poor playing at a rehearsal, and this makes the child anxious