Which factor should be the primary consideration when determining the validity of experimental study findings?
A) The extent to which the researcher controlled intervening variables
B) The number of subjects who dropped out of the control and experimental groups
C) The credentials and previous experience of the researcher
D) The number of persons involved in the data collection process

Question

Quizplus · Accepted Answer

The validity of experimental study findings is primarily determined by the extent to which the researcher controlled for intervening variables. Intervening variables are any factors that may affect the outcome of the study, but are not the independent or dependent variables being studied. By controlling for these variables, the researcher can ensure that any observed effects are due to the independent variable being studied, rather than to other extraneous factors.
The number of subjects who dropped out of the control and experimental groups, the credentials and previous experience of the researcher, and the number of persons involved in the data collection process may all have some impact on the validity of the study findings, but they are not the primary consideration. For example, a high dropout rate may reduce the statistical power of the study and limit generalizability, but it does not necessarily invalidate the findings if appropriate statistical techniques are used. Similarly, the credentials and experience of the researcher may affect the quality of the study design and execution, but they do not guarantee validity if the study design is flawed. Finally, the number of persons involved in the data collection process may affect the reliability of the data, but it does not necessarily affect the validity of the study findings.

Which Factor Should Be the Primary Consideration When Determining the Validity