Assume that you are using a pre$-$test, post test design $($with no control group$).$ You would like to add a control group to eliminate a testing threat, but the organization won't allow it$.$ How can you evaluate whether a testing effect is present, without adding a control group?

Question $41$ options:

Add a second pre$-$test

Add a second post$-$test

Add a third post$-$test

Use random assignment