Disclaimer. Multitasking scores depend heavily on device and practice. This is not an assessment of any condition. Full disclaimer

Multitasking and Dual Task Challenge

React to a symbol while remembering a flash.

A free dual task challenge. Respond to a symbol in the centre while remembering which slot flashed around it, then pick that slot. You get accuracy for each task and joint accuracy, the share of trials where both were right.

Choose a level to startEntryStart here24 dual-task trials with four slots.Regular20 dual-task trials with four slots and a shorter flash.Hard20 dual-task trials with six slots and a shorter response window, so both tasks compete more for your attention.

Start testAbout 2 minutes · demo and practice first

What it measures

Accuracy on two tasks at once: responding to a centre symbol, and remembering which of four slots flashed.

DurationAbout 2 minutes

Format24 dual-task trials

Device and setupKeyboard (Space) or one touch target, plus taps or arrow keys to choose a slot.

Accessibility limitsRequires seeing brief flashes and responding within 1.5 seconds.

Free resultAccuracy for both tasks

PrivacyYour answers are never sent to advertisers. Signed in, your results are saved to your account.

How the score works

Symbol task accuracy and slot memory accuracy are scored on the same completed trials, plus joint accuracy where both were right.

Worked example

Over 24 trials, getting the symbol task right 21 times (88%) and the slot right 18 times (75%), with both right on 16 trials, gives joint accuracy 16 ÷ 24 = 67%. Joint accuracy is usually the lowest of the three.

Entry, Regular and Hard

Entry: 24 dual-task trials with four slots.
Regular: 20 dual-task trials with four slots and a shorter flash.
Hard: 20 dual-task trials with six slots and a shorter response window, so both tasks compete more for your attention.

Each level has its own fixed set of items and its own score, so results are only compared within the same level. How levels are designed

What Premium adds

Your basic score is always free. Premium adds: Joint accuracy and timing tradeoff. It also keeps your full history on every device and removes the ads. One upgrade covers all ten tests. See Premium

Limits

Multitasking scores depend heavily on device and practice. This is not an assessment of any condition.

For education, entertainment and general self-exploration only. These activities are not medical or psychological assessments and do not diagnose, prevent or treat any condition. Results are estimates of performance on these tasks and can be affected by practice, attention, language, your device and your surroundings. If you have concerns about your thinking, vision or hearing, consult a qualified healthcare professional.

Questions

What does multitasking measure here?

How well you keep two simple tasks going at once on this device. It does not measure productivity or any condition.

Why score the tasks separately?

People often protect one task and let the other slip. Separate scores show which way you lean.

Can I compare levels?

Not directly. Each level changes the load, so compare results within the same level.

More in Speed and attention · Compare all ten tests

Made and maintained by ChowChow Labs. Content last reviewed October 23, 2026. Methodology and changelog · Report a problem