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
c
You might also like to view...
Lindey proposed a study in which she tested the effects of a new drug to treat depression. In animal trials, she became aware that some of the rats were experiencing seizures while on the medication
When Lindey went to the IRB at her college, they likely cited her for: a. failing to protect her subjects from physical harm. b. not obtaining consent from her participants. c. not keeping confidentiality. d. using deception in her research.
What do nearly all types of psychotherapy have in common?
a. The therapist uses positive reinforcement to help achieve specific goals. b. Clients honestly discuss their emotions and problems c. The therapist helps the client bring unconscious thoughts to consciousness. d. The therapist listens with unconditional positive regard.