Augustana assistant Wes Kosel put me onto this article about defensive communication.
Here are key excerpts:
1. Preparation
Don't confuse bad grammar with absence of wisdom. “I done watched three times as much film [as him],” Allen explains.
2. Timeliness
“Communicate early. That’s one key that I think basketball is losing.Knowing where your help is, and knowing what’s happening, really helps.” - Paul Gasol
3. Understanding
Communication reflects understanding. But everyone must be on the same page.
4. Experience
It won't happen immediately...but if you don't practice, then it won't happen at all.
KG is saying, "I don't need help." When a guard digs or doubles, they may expose a perimeter pass.
5. Pressure
Ball pressure reduces options during shot clock games and disallows players and teams from getting into their offense. The challenge is to pressure the ball without exposing penetration. Both the applier and the receiver are forced from their comfort zone.
6. Intimidation
Communication intimidates.