The usefulness of quasi-experimental designs for advancing knowledge is directly related to how thoroughly an investigator examines and controls for the:
A) results of the posttest analysis of a study.
B) measures to be used in a questionnaire to record responses.
C) method to be used for statistical analysis.
D) selection criteria used in forming the initial groupings.

Question

Quizplus · Accepted Answer

Quasi-experimental designs are often used in situations where random assignment of subjects is not possible or ethical. However, to increase the internal validity of the study, it is important to carefully examine and control for the selection criteria used in forming the initial groupings. This includes ensuring that the groups are comparable in important ways, such as age, gender, and baseline levels of the outcome variable. By controlling for selection factors, the investigator can be more confident that any observed differences between the groups are due to the intervention or treatment being studied, and not due to pre-existing differences between the groups. Posttest analysis, questionnaire measures, and statistical analysis are also important considerations in designing a quasi-experimental study, but are not as directly related to the internal validity of the study as the selection criteria.

The Usefulness of Quasi-Experimental Designs for Advancing Knowledge Is Directly