Track

A handful of identical dots — a few briefly light up as your targets. The highlight fades and every dot starts moving. Follow the ones you were told to track. When the motion stops, tap the dots you followed.

The Science: The Multiple Object Tracking paradigm (Pylyshyn & Storm, 1988), used to train NBA guards, NFL quarterbacks, and military pilots. Most adults track four objects at once; athletes push into five and six.