Which of the following is true of a nonequivalent control group design?
A)The design does not include a separate control group.
B)The two groups in the experiment are the result of random assignment.
C)The problem of selection differences is likely to arise in this design.
D)The same group of people is observed at different points in time as they grow older.

Question

Quizplus · Accepted Answer

In a nonequivalent control group design, the two groups are not randomly assigned, and therefore selection differences are likely to arise. This makes it more difficult to infer causation because differences between groups may be due to preexisting differences rather than the manipulation of the independent variable.

Which of the Following Is True of a Nonequivalent Control