In the randomized, posttest-only, control-group design, external validity is protected by
A) random selection of the sample.
B) random assignment of participants to groups.
C) use of a control group.
D) None of the above
Answer: A
Political Science
You might also like to view...
The dual court system of the United States refers to __________ and __________ courts.
A. trial; appellate B. criminal; civil. C. statutory; common law D. federal; state E. legislative; constitutional
Political Science
The only two states that are exceptions to the unit rule are
A. Georgia and Louisiana. B. Rhode Island and Oregon. C. Maine and Nebraska. D. New Hampshire and Vermont. E. Michigan and Montana.
Political Science