Which of the following pattern of results of a nonequivalent control group design is generally interpretable?
a. The control and experimental groups are equal in the pretest, but unequal in the posttest.
b. The control group is higher than the experimental group on both pretest and posttest, but the experimental group increases more.
c. The experimental group is higher than the control group on both pretest and posttest, but the experimental group increases more.
d. Any pattern in which the experimental group changes more than the control group from pretest to posttest.
Question 2A distinguishing characteristic of the nonequivalent control-group design is that the
a. control group does not receive a pretest
b. researcher has control over confounding variables
c. experimental and control treatments are randomly assigned to the groups
d. subjects are not randomly assigned to the experimental and control groups
Question 3If X = experimental treatment and O = pretest or posttest observation, then for O X O, O represents the _____ design.
a. nonequivalent control group
b. interrupted time series
c. delayed control group
d. repeated treatment
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