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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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edwii edwii
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6 years ago
The nurse is conducting a study on how regular physical activity affects the risk for developing lung cancer among smokers.
 
  One group leads a sedentary lifestyle whereas the other has agreed to undergo regular supervised exercise in the gym of a local hospital. During the study, the sole treadmill in the gym broke down and was unable to be used for the last half of the study. Several study participants who preferred the treadmill to other machines did not exercise as long or as intensely as they might otherwise have. Which threat to the external validity of the study does this represent?
  A) Interaction of history and intervention
  B) Interaction of selection and intervention
  C) Experimenter/participant effect
  D) Novelty
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MSROGERSMSROGERS
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6 years ago
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edwii Author
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6 years ago
This site is awesome
jcarter
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Just got PERFECT on my quiz
Helpmeplease11
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Helped a lot
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