In order to test the effect of praise on learning, a group of students receive verbal encouragement every time they do something correct. At the end of the semester, their grades are recorded and analyzed. What is missing from the above design?

Question

Quizplus · Accepted Answer

The design is missing a control group, which would receive no verbal encouragement, in order to compare the effect of praise on learning to the normal learning experience. Without a control group, it is impossible to determine if the verbal encouragement had any impact on grades.

In Order to Test the Effect of Praise on Learning