_____________ occurs when government services are sold off to private enterprises.

For what kinds of situations is the changing-criterion design particularly useful?

a. when evaluating psychotherapies for affective or anxiety disorders b. when the participant's behavior requires shaping to attain a goal c. when the target behavior often fluctuates wildly over time d. when other designs have proved to be useless, since the changing criterion design is new.

Who is considered the founder of modern-day polling?

a. George Gallup b. Alfred M. Landon c. Walter Lippmann d. John Zogby