Confounding of variables is more the rule than the exception in which type of research?

If an experiment is ecologically valid, then the effect of the treatment used in that experiment should be

a. stronger in the real world than in the laboratory. b. evident in other settings. c. stronger in the laboratory but still detectable in the real world. d. more easily measured in conditions in which control is possible.

Under many American presidents since the end of World War II, the State Department has taken a back seat in foreign policy to the president's _________.

A. National Security Council B. Peace Corps C. Securities and Exchange Commission D. Government Accountability Office