Multitasking

Do two things at once and see how well your brain handles it.

• Top: Numbers flash one at a time — count how many are odd.
• Bottom: Shapes appear — click every circle, ignore squares and triangles.
• Both tasks run at the same time for 20 seconds.
• Average person scores 65% when doing both at once.

Dividing attention across two simultaneous tasks reveals your brain's executive control under load. True multitasking capacity is limited, and performance on divided-attention tasks correlates with working memory and cognitive flexibility.