- Do not control for the effects of participant expectancies, 'common elements' or nonspecific effects, time spent in treatment. 

- Ethical issues for no-treatment controls

I'm going to encourage you a little, to help you get started. :)

I am going to encourage you a little, to help you get started :)
Since you looked us up and read the site enthousiastically, I would like to offer you a big discount.