Why would a nurse researcher want to limit or eliminate extraneous variables in a study?
A) More research questions would be required to define the extraneous variable.
B) Extraneous variables compete with the dependent variable as an explanation of the study's outcome.
C) Extraneous variables compete with the independent variable as an explanation of the study's outcome.
D) Manipulation of the extraneous variables increases the risk for researcher bias in the study's outcome.

Question

Quizplus · Accepted Answer

Correct C: Extraneous or mediating variables interfere with analyzing the effect of the independent variable(s)on the dependent variable.
Incorrect A: Research questions are not necessarily linked to or controlling of extraneous variables.
Incorrect B: The dependent variable is influenced by the independent variable.
Incorrect D: Manipulation of extraneous variables does not necessarily increase (or decrease)the risk for researcher bias.

Why Would a Nurse Researcher Want to Limit or Eliminate