There are too many variables for your absurd request for scientific proof.
Really? Wow, I guess you know absolutlely nothing about mental health care or scientific study in general.
Of course a valid study can be done. They're done all the time and yield valid, quantitative data.
The question is why doesn't Carlbrook do follow-up testing or analysis? If they were a "professional" outfit, it would be an integral part of their business plan to address efficacy.
In the absence of a plan to address efficacy, I can only assume that Carlbrook doesn't want to have their effectiveness put to the test. Usually that's because the seller already knows the product won't stand up to scrutiny. Carlbrook knows that they don't help the majority (or even a small plurality) of kids, they just don't want everyone else to know.
Now, Karen, I know you claim to be an educated woman, but what you are saying is patently ridiculous and is industry quack-speak for invalidating legitimate criticisms.
These types of statements are used by all program supporters. They throw out strawmen, red-herrings, ad hominem fallacies and post hoc fallacies relentlessly to avoid the real issues.
What dear Karen MEANT to say (but somehow can't bring herself to do it) is that
she sent her kid to an experimental treatment center whose practices have no basis in accepted mental health treatment and that keeps no statistics on the results of their "treatment." I wouldn't send my kid to a place so bankrupt of professionalism.
So, I guess all you parents out there should just trust Karen's word for it rather than look for empirical evidence - you won't find any of that anyway...