You might be thinking of this[0] 1981 book which claims similar for the Navy. I've personally used this same technique taught to me by some random from IRC who

You might be thinking of this[0] 1981 book which claims similar for the Navy. I've personally used this same technique taught to me by some random from IRC who claimed to be an ex-con, and despite his questionable credentials it has legitimate results. I believe I've read about it in at least one science fiction novel, too. [0]: https://archive.org/details/Relax-and-Win_Championship-Performance-by-Lloyd-Bud-Winter https://archive.org/details/Relax-and-Win_Championship-Perfo...