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?

Anika resisted changing her answer to a test question after reminding herself that "it's always best to stick with your first answer." Anika's decision best illustrates the use of

A) insight. B) an algorithm. C) trail and error. D) a heuristic. E) a prototype.

With regard to healthy years of life, which statement is NOT true?

A) Men live longer in health than women. B) Women are more likely than men to have ADL (activities of daily living) impairments in their older years. C) In some nations, the average person stays healthy until the day of death. D) Total life expectancy is longer than the years people can expect to live in health.