Which of the following could be used to eliminate the confounding influence of extraneous variables?
a. holding the variable constant
b. rejecting the participant that is above or below a certain criteria
c. using random assignment
d. a and c
After you have developed a research idea, the next step is to
a. determine if the study is feasible.
b. review the literature.
c. write a scientific hypothesis.
d. write a null hypothesis.
Dr. Van Offer is using official existing statistics to support a theory that he has proposed.
He has met the Governor of the state where is research is being conducted, and is very surprised when she calls and asks him to use the statistic in a different way that will not be damaging to her.
Discuss the ethical concerns in this incident and other nonreactive research.
What will be an ideal response?
A ____________ variable is one that is not controlled by the experimenter; if this variable has a differential impact on the different groups in the study then it is called a ___________ variable.
a. confounding; extraneous
b. extraneous; confounding
c. independent; extraneous
d. independent; confounding
Which of the following would be the least capable of scientific investigation and thus would represent the worst potential research idea?
a. Which art form is the more valuable to society, paintings or music?
b. Which is better to increase alertness, caffeine or nicotine?
c. Which species can learn a particular maze better, rat or mouse?
d. Which produces better learning, studying with or without music?
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