How can a nurse researcher know that a research study has external validity?
A) External validity refers to the relationship existing between the independent variable and study outcomes.
B) External validity refers to the influence of a specific event on the dependent variable.
C) External validity refers to the degree to which extraneous or mediating variables interfered with the study outcomes.
D) External validity refers to the degree to which findings are generalizable to populations beyond those studied.

Question

Quizplus · Accepted Answer

Correct D: External validity deals with possible problems of generalizability of the investigation's findings to other populations or environments.
Incorrect A: Internal validity refers to the relationship between the independent variable and the study outcomes.
Incorrect B: Influence of a specific event on the study (historical threat)usually is associated with the independent variable (internal validity).
Incorrect C: Extraneous or mediating variables usually are associated with the effects of the independent variables.

How Can a Nurse Researcher Know That a Research Study