The lazy definition
"He has a high basketball IQ" usually means "he made a play I liked." That's not useful.
A working definition
Basketball IQ is the speed and accuracy of three reads:
- Spacing read — where are the five offensive players standing, and what does that force the defense to do?
- Leverage read — who has the advantage right now (driver vs closeout, big in drop vs roll, switch vs mismatch)?
- Time read — how many seconds are left on the shot clock, the game clock, and the possession?
How to train it
Watch a possession with the sound off. Pause at the catch. Ask: what is the defense forcing? what would I do? Then play. You'll be wrong constantly. That's the point.
The Basketball IQ Test is a quick way to spot where your reads are weakest.