Chronotype
When your brain is actually on, and how far that is from when your week wants it on.
- Questions
- 6
- 1 min
- Mid-sleep on free days, corrected for sleep debt
What this is
The method is Roenneberg's: chronotype is read from the mid-point of sleep on free days rather than from an opinion about mornings, corrected for the sleep being repaid on those days. The Munich ChronoType Questionnaire itself is not reproduced — these are our own six fields feeding the published calculation. Sleep timing is a real physiological variable, but this is four numbers you typed, not a sleep study.
Where it comes from
written down, not impliedMid-sleep on free days, corrected for sleep debt
Chronotype is calculated the way the Munich ChronoType Questionnaire (Roenneberg and colleagues) does it: the midpoint of sleep on free days, corrected for sleep debt. The method is published; the questionnaire's own items are not used.
Written for this app
- Reliability
- not measured
- Factor structure
- not measured
- Validity
- not measured
Further reading
- Roenneberg, T., Wirz-Justice, A., & Merrow, M. (2003). Life between clocks: Daily temporal patterns of human chronotypes (opens in a new tab). Journal of Biological Rhythms, 18(1), 80–90original source
- Roenneberg, T., Kuehnle, T., Juda, M., Kantermann, T., Allebrandt, K., Gordijn, M., & Merrow, M. (2007). Epidemiology of the human circadian clock (opens in a new tab). Sleep Medicine Reviews, 11(6), 429–438original source
- Roenneberg, T., Pilz, L. K., Zerbini, G., & Winnebeck, E. C. (2019). Chronotype and social jetlag: A (self-) critical review (opens in a new tab). Biology, 8(3), 54review
Read the result as a structured version of what you said, not as a measurement of you.
Why these questions carry no evidence
Every questionnaire in this app writes its own items, because the framework behind an instrument is usually public while the published questionnaire is copyrighted. That is the honest way to build it and it has a cost worth stating plainly: reliability and validity belong to a specific set of questions given to a specific group of people, not to the name of the idea behind them. These questions have never been given to a sample, have no norms, and have no evidence that they measure what they are named after.