We wish to test the hypothesis that music improves learning.We compare test scores of students who study to music with those who study in silence.Which of the following is an extraneous variable in this experiment?
A) the presence or absence of music
B) the students' test scores
C) the amount of time allowed for studying
D) silence

Question

Quizplus · Accepted Answer

The amount of time allowed for studying can potentially impact test scores, regardless of whether music is present or not. Therefore, it is an extraneous variable that needs to be controlled in the experiment. A is the independent variable, B is the dependent variable, and D is simply the absence of music, which is already controlled for in the experiment by comparing those who study with music and those who study in silence.

We Wish to Test the Hypothesis That Music Improves Learning