Mr. Jacobs wants to find out whether a new program for teaching physical education promotes students' physical development. So he gives his students a number of tests before they begin the program (pretests)and the same tests again after they have been in the program for eight months (posttests). He finds that the students' posttest scores are higher than their pretest scores and so concludes that the program is effective. What is definitely wrong with Mr. Jacobs' conclusion?
A)Eight months is too short a time for such a program to have a long-term effect.
B)There are other possible explanations for his results.
C)Tests are not a good measure of physical development.
D)The posttests should always be different from the pretests.

Question

Quizplus · Accepted Answer

There could be other factors contributing to the improvement in scores, such as natural development over time, increased familiarity with the test format, or other external influences, which Mr. Jacobs did not account for.

Mr Jacobs Wants to Find Out Whether a New Program