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
ANSWER: c
You might also like to view...
The textbook suggests a list of "year-round resolutions" as guidelines to better mental health. This advice includes all the following EXCEPT to
a. have several close friends to share feelings, joys, and worries. b. give yourself and others only constructive criticism. c. acknowledge setbacks but move on. d. focus only on the present, forgetting the past and ignoring the future.
Children who display impulsive or unruly behavior and experience high conflict with others are showing ____
a. internalizing problems b. externalizing problems c. existential problems d. incomplete dominance problems