So we do random assignment, placebo controlled, long term studies of different interventions.

And we find that we've been able to manualize many of them, and we actually carry out random assignment efficacy and effectiveness studies.

Quasi experimental research shares similarities with the traditional experimental design or randomized controlled trial, but they specifically lack the element of random assignment to treatment or control.

And then we were able to test them rigorously, in random assignment, placebo controlled designs, throw out the things that didn't work, keep the things that actively did.

Maybe it's our assignment.

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