Cognitive flexibility

Task Switch

A 3-minute reaction drill that trains task switching: each round a stimulus appears under one of two rules and you classify it against that rule. The same paradigm used in trading-firm cognitive assessments, including Optiver's Zap-N test.

Settings

Save

Mode

Realistic

Switch between classifying a letter (consonant / vowel) and a number (odd / even).

Upgrade to unlock Realistic (Optiver Zap-N) mode.

Timer3 minutes

1 min10 min

Start session

Performance

This mode

highest score / min

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attempts

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Track your best scores and watch your accuracy climb across every session.

Settings

Performance

Frequently asked questions