Dr. Harem is studying the effects of drugs on memory. He gives his participants several
lists of nonsense words.
After the participants study a list for five minutes, he measures
their memory ability by asking them to write down all the nonsense words that they can
recall in two minutes. Which of the following statements about this study is true?
a. The independent variable is the number of words that subjects can recall.
b. Dr. Harem's study has one control group and two experimental groups.
c. The control group in this study is given lists of nonsense words to memorize.
d. Dr. Harem has operationally defined the variable of memory ability.
e. The experiment is confounded by the use of nonsense words.
d. Dr. Harem has operationally defined the variable of memory ability.
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