The stuff about "Shoulds" is usually credited as coming from Dr. Karen Horney, and The Tyranny Of The Shoulds. [www.ship.edu
I think she figured that one out first, and then CBT tested and refined it.
It has been proven that when people berate themselves with SHOULDS, they make themselves miserable, and there is no escape. So that is now a part of CBT.
In REBT that is also called Musturbation...as in MUSTS. Too many MUSTS in your life, and you are miserable as hell.
(The Work of Byron Katie is full of Shoulds and Musts that will make people miserable)
Personally, I don't see the Turnaround as being the same as CBT in this method, as with CBT its about NOT having polarized thinking, but flexible thinking.
In CBT it would be more like...I would PREFER it didn't happen, but it did, and I can handle it, even though I may not like it. (something like that, to soften it)
Byron Katie is very extreme and even fanatical and absurd in her thinking methods.
She would say, it should have happened and its WONDERFUL it happened. This is how she then extrapolates to how the Nazi's killers were doing the work of the Byron Katie "God".
Also, for those of us who have worked inside LGAT's for a period of time, it becomes very clear after less that 1 year, that the people running the LGAT know what is up. They are utterly cynical. They know it doesn't work, they see the same "screwed-up people" with the same problems coming back over and over. They know who their target market is very well.
From studying Byron Katie, its very clear she knows EXACTLY what she is doing. But for a person with a normal conscience, we can't understand how they can do this stuff, but they do it.
for example, could anyone reading this go out and smash a car window and grab the contents of a car? Of course not. But thousands have no problem doing that at all.
Its the same mentality on the LGAT circuit, they get so deep into it, they start to believe its unethical to NOT take the suckers money. Like L Ron Hubbard of Scientology.
Byron Katie is in that category, even just by the overt falsehoods being told with a straight face constantly. She is way out there.
Yes, it's been noted at least once before that Byron Katie may have done EST and/or Landmark, and used that to formulate her method.
I am still in the midst of reading Dr. David D. Burns' "Feeling Good: The New Mood Therapy" and was struck by something recently because it sounded AN AWFUL LOT like something Byron Katie does.
It involves her "turnaround" technique.
If someone says a particular thing "shouldn't have happened", BK will have that turned around to say, "It should have happened." And she'll add, "How do I know that it should have happened? Because it did. That's reality."
I now wonder if BK pilfered this idea from David Burns' book. It was originally published in 1980. That's six years pre La Cucaracha. Ample time to have read it and stolen the idea from Burns. (I'm not saying it DID happen, just that it COULD have.)
Here's David Burns:
"Another anti-should method involves showing yourself that a should statement doesn't fit reality. For example, when you say, 'I shouldn't have done X,' you assume (1) it is a fact that you shouldn't have, and (2) it is going to help you to say this. The 'reality' method reveals -- to your surprise -- that the truth is usually just the opposite: (a) In point of fact, you should have done what you did; and (b) it is going to hurt you to say you shouldn't have.