By pretesting the two groups on the dependent variable in a randomized, pretest-posttest, control-group design, we
A) rule out variance on all variables of all groups.
B) test for initial equivalence on the dependent variable.
C) eliminate confounding.
D) None of the above.
Question 2
The randomized pretest-posttest, control-group design is an improvement over the randomized posttest-only, control-group design because
A) the former adds an additional control group.
B) the latter employs randomization only at the time of the posttest.
C) the former adds a pretreatment measurement of the independent variable.
D) the former adds a pretreatment measurement of the dependent variable.
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