Dr. Kalmagura plans on introducing a new exam review procedure in his chemistry classes. To check the effectiveness of the new procedure he is going to have half his students try the new technique for one semester, while the remaining students review in the way they have always done in the past. He asks each student to decide whether they would like to use the new technique or the standard technique. What procedure is illustrated in this example?

Question

Quizplus · Accepted Answer

This is an example of non-random assignment, where the students are not randomly assigned to either the new review technique or the standard technique. Instead, they are given the choice to decide which technique they would like to use. Therefore, this is not a randomized experiment and the results may be biased due to self-selection. A randomized experiment would have randomly assigned students to either the new or standard technique.

Dr Kalmagura Plans on Introducing a New Exam Review Procedure