Which of the following is NOT essential to conducting an internally valid experiment?

Question

Quizplus · Accepted Answer

Random selection of the sample from the population is not essential for conducting an internally valid experiment as random assignment to conditions is sufficient to establish internal validity. However, random selection is important for external validity, as it ensures that the sample is representative of the population and the results can be generalized to a larger population. The other options listed (measurement of the dependent variable, keeping everything in the experimental conditions the same except for the independent variable, and the use of operational definitions) are all essential for ensuring internal validity.

Which of the Following Is NOT Essential to Conducting an Internally