00:03
All right, our first question here, it says, a withdrawal experimental design rules out confounding variables by removing the treatment variable in the third phase.
00:11
The changing criteria design rules out confounding variables by, and our options are varying length of phases, which is not correct.
00:20
B, varying the magnitude of criterion changes, also would be incorrect.
00:25
C, varying the number of criterion changes, and that actually is looking to be pretty good.
00:31
Or d, all the above.
00:33
So in this particular case, option c is going to be our strongest option, varying the number of criterion changes.
00:44
And the reason is the changing criterion design rules out confounding variables by varying the number of criterion changes, not the length of phases or the magnitude of criterion changes.
00:55
So again, c for number one.
00:59
Let's look at our next question.
01:01
So all the following are advantages of the changing criterion design except, and we have a, measure change in a stepwise fashion, and that would not be correct.
01:12
We have b, lack of treatment withdrawal, which is actually looking pretty promising.
01:17
C, it can be used for shaping programs.
01:20
That would be incorrect.
01:22
Or d, only one target behavior is required, and that would be incorrect...