Which of the following is a technique to improve internal validity?
A)Addition of a control group
B)Experimenter expectancy
C)Participant bias
D)Use of a confederate

Question

Quizplus · Accepted Answer

Adding a control group is a technique to improve internal validity by ensuring that any observed effects are not due to extraneous variables or factors other than the independent variable being manipulated. The other choices listed are potential sources of bias that can compromise internal validity.

Which of the Following Is a Technique to Improve Internal