Phil is being treated for obsessive-compulsive disorder. The treatment involves gradually exposing him to the anxiety-producing situation that Phil is trying to avoid. This treatment is called:

A researcher says, "These studies make it too easy for investigators to find the background factors they expect to find. However, the studies would be more valid if we found documents like school reports that show the background factor before the disorder emerges." What kind of research strategy is the researcher referring to?

A. Prospective strategy B. N=1 strategy C. Retrospective strategy D. Analogue study

Are there ethnic differences in breast-feeding in the U.S.? Explain your response

What will be an ideal response?