A researcher is testing the effectiveness of a new math program. The extraneous variables, such as temperature and lighting, will best be controlled by
A)randomly assigning students to rooms of varying temperature and light intensity.
B)randomly selecting the rooms in which the students will be taught.
C)making the temperature and the amount of light the same for all the rooms.
D)letting the students select the room temperature and lighting in which they are most comfortable.

Question

Quizplus · Accepted Answer

Controlling extraneous variables like temperature and lighting ensures that they do not affect the outcome of the experiment. By making these conditions uniform across all rooms, the researcher can ensure that any differences in math program effectiveness are not due to variations in temperature or lighting.

A Researcher Is Testing the Effectiveness of a New Math