Professor Smith studied the effect of giving either two, four, or eight pellets of reward to rats that ran a maze. He measured how fast they ran, and how many wrong turns they made. How many levels of the independent variable did he have?
a. one
b. two
c. three
d. can't tell
Question 2Which one of the following statements does not contain both an independent and dependent variable?
a. The effects of physical distance on ratings of attraction
b. Children's defensive and aggressive behaviors in a school setting
c. Cooperation among nursery school children under two types of instruction
d. Sexually coercive behavior of college males as a function of masculinity and attitudes toward women's rights
Question 3The independent variable in a study
a. Is a variable that is extraneous to the study
b. Is believed to be responsible for the change in the dependent variable
c. Reflects differences between subjects that cannot be controlled
d. Is the response that a subject makes
Question 4If we measured the miles per hour that Yolanda traveled when running, we would actually be measuring the _____________ of her behavior
a. Frequency
b. Locus
c. Duration
d. Rate
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