What is the purpose of random assignment in the between groups factorial experiment? It _____
a. doesn't exist; matching is always used
b. is a way for controlling the effect of the treatment
c. assures that groups are equivalent before the treatment
d. doesn't exist; each subject is her or his own control
C
Random assignment is used to control for such things as personality variables and experiential differences among participants at the outset of the experiment.
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Identify and explain the risk factors associated with suicide.
What will be an ideal response?
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A) 15 B) 25 C) 35 D) 45 Answer: B
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A) about 70 percent B) about 80 percent C) about 90 percent D) nearly