What action by a nurse researcher will help eliminate bias on the dependent variable?
a. Establishing strict eligibility criteria for the study participants
b. Ensuring that all data are collected by a single researcher
c. Formulating at least two hypotheses for each research question
d. Developing a strong theoretical framework for the study
ANS: A
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A Strict eligibility criteria help reduce extraneous or mediating variables that compete with the study (independent) variables for impact on the dependent variable.
B Collection of data by a single researcher would provide constancy in data collection but would not control bias if poor sampling techniques were used.
C Formulating two hypotheses would not eliminate bias.
D Testing of a theoretical framework does not by itself control bias.
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