How many levels does a two-way X2 have?
a. None because nothing is manipulated
b. At least 1
c. 2
d. 2 or more for each variable
Ans: D
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Which of the following is the most effective ways of giving oral stimulation to a man's genitals?
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In sleep deprivation studies, what is the pattern of performance?
A. performance declines at night and shows some recovery during the next day B. performance declines and night and continues until the next sleep period C. performance increases during the night but declines during the next day D. performance increases during the night and continues until exhaustion is reached