In an experiment to test whether teaching a new memory strategy will improve students' test scores, student characteristics, such as motivation, are controlled by
A)interviewing each student concerning their motivation in the class.
B)giving each student a personality test.
C)randomly assigning students to the two groups.
D)interviewing the teachers concerning each of the students.

Question

Quizplus · Accepted Answer

Randomly assigning students to the two groups helps to ensure that any differences in student characteristics, such as motivation, are evenly distributed across both the experimental and control groups, thus controlling for these variables.

In an Experiment to Test Whether Teaching a New Memory