NASA wanted to know if extended periods of weightlessness would have an impact on long-term circulatory function. The agency located seven former astronauts who had spent more than one month in space under conditions of weightlessness, and tested all aspects of their cardiovascular function. NASA's research with these seven astronauts would be considered to be

Question

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NASA's research with the seven former astronauts is a case study research because it involves in-depth examination of a single subject or a small group of subjects.

NASA Wanted to Know If Extended Periods of Weightlessness Would