Does giving an incentive really work on improving exam scores? For example,consider the following treatments to measure the use of incentives. Treatment 1: No incentive
Treatment 2: Incentive given to all
Treatment 3: Incentive given only if a certain score is received
For this experiment,assume all subjects are seniors at a university.If a block design were used,what would be an appropriate blocking variable for this study?
A)Exam
B)Treatment
C)None of the above

Question

Quizplus · Accepted Answer

Blocking variables are used to account for variability among experimental units that might affect the response variable, but are not the primary focus of the experiment. In this case, since all subjects are seniors at a university and the treatments are about incentives, an appropriate blocking variable could be something that captures inherent differences among the students that might affect their exam scores, such as their major, previous GPA, or study habits. Since none of these options are listed, the correct choice is "None of the above."

Does Giving an Incentive Really Work on Improving Exam Scores