After-only design should be used for measuring attitude change only when
A) there isn't a control group in the design of the study.
B) participants are placed in either the treatment or control condition completely by chance.
C) covert measures of attitudes are used.
D) there isn't random assignment.

Question

Quizplus · Accepted Answer

After-only design is appropriate when participants are randomly assigned to treatment or control groups, as it allows for the assumption that any differences in outcomes are due to the treatment itself.

After-Only Design Should Be Used for Measuring Attitude Change Only