According to Cook and Campbell (1979), if you have evidence that the naturally-occurring groups in a nonequivalent control-group design are NOT equivalent on potential confounding variables,
A) you should find new naturally-occurring groups that are equivalent.
B) you may be able to draw conclusions if you carefully evaluate all potential threats to validity.
C) you should continue with the experiment as planned, because the groups only need to be equivalent on the dependent measure.
D) you may be able to draw conclusions if you reassign participants to different groups.
Answer: B
Political Science
You might also like to view...
If a presidential candidate felt confident of being able to raise enough money for a campaign, he or she might choose not to accept __________
Fill in the blank with the correct words.
Political Science
The ability to __________ is a concurrent power shared by the national and state governments
a. coin money b. declare war c. tax d. regulate interstate commerce
Political Science