Interest groups, political parties, social movements, and nongovernmental organizations are all examples of:

The increased use of factorial designs in research has come about largely because they are

A) less complicated to analyze. B) more sensitive than other designs to the effects of the independent variable. C) better at testing several causal hypotheses within a single design. D) used by all important psychologists.

In the past decade, approximately what percentage of expenditures by state and local governments has come from federal grants?

a. 2 percent b. 7 percent c. 15 percent d. 20 percent e. 30 percent