Which data collection method is most vulnerable to researcher bias?
a. Questionnaires
b. Available data
c. Observation methods
d. Physiologic measurement
ANS: C
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A Questionnaires, because they are prestructured, are less susceptible to researcher bias.
B Available data do not constitute a data collection method.
C Researcher bias can most affect observational methods because the researcher is the observer.
D Physiologic measurement is objective and less susceptible to researcher bias.
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