A nurse researcher assigns subjects to experimental and control groups in such a manner that each subject in a population has an equal chance of being selected. What is the researcher using?
a. Selection bias
b. Convenience sampling
c. Randomization
d. Internal validity
ANS: C
Feedback
A Selection bias occurs when precautions are not used to gain a representative sample.
B Convenience sampling refers to the sampling method in which subjects who are available are used. These subjects do not necessarily represent the population.
C Randomization is the process of obtaining subjects so that each has an equal chance of being selected for experimental or control groups.
D Internal validity refers to confidence that the independent variable made the difference in the dependent variable, not some extraneous, intervening variable.
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