Ahhh-- but see, Training =/= "education."
Yes, it works for some types of learning. But I'd also submit that the current version of it incorporates far LESS interactive feedback than human-based feedback mechanisms once did.
The part of the feedback loop which is important is time-dependent. I don't have the reference handy, but that is something that PI/online-learning proponents have touted as a reason to demonstrate that it works BETTER than "conventional" instruction. One problem is that they don't bother to tell what they mean by "conventional" instruction, and often when you dig into this research, the "conventional" methods look very little like moderate classroom practices.
