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A researcher reviews demographic characteristics of potential study subjects, such as age and gender, to determine whether these characteristics may influence the outcome of the study.Correct!A researcher conducts a quasi-experimental study to determine whether there is improved weight gain among premature infants who are fed according to cue-based protocols. The researcher trained neonatal intensive care nurses to applyReliabilityTest -retest reliability
according to standard protocols. The reviewer notes that parents who gave consent to participate in the study were from a higher socioeconomic class than the population as a whole. This is a threat to:Correct!