Most of the debate surrounding the 1970 Clean Air Act centered on the issue of pollution from

The problem of experimenter reactivity in correlational research may be solved by

A) Performing no manipulations. B) Holding an extraneous variable constant. C) Using two independent experimenters, one to measure each variable. D) Using involuntary participants.

Which of the following are among the basic agents of political socialization?

a. Families b. Schools c. Churches d. The media e. All of the above