If There Have Been a Large Series of Single Case

Multiple Choice

If there have been a large series of single case designs (more than 9) demonstrating efficacy, which criteria must be met to be considered an empirically supported treatment?

A) use of good experimental design
B) compared the intervention to another treatment
C) use of a treatment manual
D) demonstrated effects by at least two different investigators or practitioners
E) all of the above are criteria that must be met