← BRAIN POWER LAB
— INTERACTIVE LAB —

The Chronotype Lab

When your brain is wired to do what.

Time of day explains 20% of the variance in cognitive performance. These five short experiments map your personal rhythm — peak, trough, and recovery — and show you how to schedule around it.

Read the science behind the lab →
1
START HERE · 90 SEC
Peak Time
Mapper
Find when your brain is sharpest.
Six questions, one personalized daily map. Your results unlock the rest of the lab.
START →
2
FREE · 2 MIN
The Owl
Flip
Lark, owl, or third bird?
A deeper chronotype quiz that reveals which 20% have a reversed rhythm — and how to know if you're one of them.
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3
UNLOCK · 3 MIN
The Task
Sorter
Right work, right window.
Drag fifteen real work tasks into peak, trough, and recovery. See where most people get it wrong.
START →
4
UNLOCK · 90 SEC
When
Should I…?
A decision tool for tomorrow's calendar.
Type what you need to do. Get back the optimal time window — based on your rhythm.
START →
5
UNLOCK · 2 MIN · THE CLOSER
The 20% Visualizer
See the cost of ignoring your rhythm.
An interactive that shows what 20% variance actually means — and how much output you leave on the table by scheduling badly.
START →
— THE SCIENCE BEHIND THE LAB —
The Chronotype Lab is built on the chronotype research synthesized by Daniel Pink in When: The Scientific Secrets of Perfect Timing. Every chronotype moves through the same three phases each day — peak, trough, and recovery — and each phase is wired for a different kind of work. Sorting tasks correctly isn't about discipline. It's about matching the task to the brain state.