In Rory Miller's book Drills he talks about various "one-step" drills where you each get one movement at a time with a partner. This move can be either an attack or a defense, done slowly, and they can do one move as well per one of yours. The description is "one partner initiates a move in slow motion and the other patner at equal speed makes one motion to respond." It continues to say that "The flaw in this drill is the artificiality of the timing–both slow motion and taking turns." (OS1, for anyone with the book).
I like this drill conceptually as a self defense drill and I have experimented with it a few times. Some things I can't quite seem to settle on are how much the turns overlap and the degree of commitment. For example:
Ainitiates a straight punch at
B, seeing the straight punch comes in, starts to initiate a block.
At what point does
B start to move to get the maximum effect out of the drill? At what point does
A get to alter their attack or are they carrying it through to completion just to start the next attack?
Essentially I am looking for the most effective way to manage turns and to explain how a "turn" works to people who are potentially quite experienced martial artists, but who have never done this drill before.