A nurse researcher should attempt to clearly specify exclusion criteria for a study sample because such criteria will do what?
A) Limit the time needed to complete the study
B) Reduce the effect of extraneous variables on the accurate evaluation of the outcome variable
C) Eliminate the outside influences and inferences regarding the effectiveness of a behavioral intervention
D) Ensure that an adequate sample size is accrued to meet assumptions for accurate statistical analysis

Question

Quizplus · Accepted Answer

Exclusion criteria are used to identify potential participants who should not be included in a study sample because of specific characteristics or conditions that may impact the outcome of the study. By specifying exclusion criteria, a nurse researcher can reduce the effect of extraneous variables that could confound the results of the study. This improves the internal validity of the study, which is the extent to which the study accurately evaluates the intended outcome variable. Exclusion criteria do not directly limit the time needed to complete the study, eliminate outside influences and inferences, or ensure an adequate sample size, although they may indirectly impact these factors.

A Nurse Researcher Should Attempt to Clearly Specify Exclusion Criteria