PeakBio/Chronotype Quiz
25 Questions

What is your chronotype?

This assessment is based on the Munich Chronotype Questionnaire (MCTQ) developed by Dr. Till Roenneberg and the Horne-Ostberg Morningness-Eveningness Questionnaire. It takes about four minutes.

Question 1 of 25

What is a chronotype, exactly?

A chronotype is your biological tendency to feel alert and sleepy at certain times of day. It is not a habit you formed — it is largely determined by genetics. Research by Roenneberg and colleagues at Ludwig Maximilian University Munich found that chronotype is distributed continuously across the population, with most people clustering around intermediate types and smaller proportions at the extreme morning and evening ends.

The four-type model used here (Lion, Bear, Wolf, Dolphin) was popularized by Dr. Michael Breus in his 2016 book and is a practical simplification of the continuous chronotype spectrum. The underlying science is the same: your internal clock runs on a slightly different schedule than the standard 24-hour day, and your chronotype describes where on that spectrum you sit.

Why does chronotype matter for performance?

Your brain and body do not operate at constant capacity throughout the day. Core body temperature, cortisol, testosterone, melatonin, and adenosine (the sleep pressure molecule) all oscillate in 24-hour cycles. Cognitive tasks that require working memory and sustained attention are best performed at your circadian peak. Tasks that benefit from reduced inhibition and loose associative thinking — what psychologists call "insight problems" — are often done better when you are slightly off-peak.

A 2011 study by Christoph Randler found that students who took exams at their chronotype's peak time scored significantly higher than those who tested at suboptimal times. Applied to work and study, this means scheduling your most cognitively demanding tasks during your biological peak window can meaningfully improve output quality — even without changing the total time spent.

Can your chronotype change?

Yes, to a limited extent, and it does change naturally with age. Research shows that chronotype shifts toward eveningness during adolescence, peaks in eveningness around age 19–21, then gradually shifts back toward morningness through adulthood. By the mid-50s, most people have shifted considerably earlier than they were in their twenties. This is a well-replicated finding in large epidemiological studies using the Munich Chronotype Questionnaire (MCTQ).

What you cannot easily change is your underlying genetic set point. Twin studies estimate that roughly 50% of chronotype variance is heritable. That said, light exposure, exercise timing, meal timing, and social schedule can all shift your expressed chronotype somewhat.

The science behind this quiz

The questions in this assessment draw from two validated instruments: the Horne-Ostberg Morningness-Eveningness Questionnaire (MEQ), published in 1976, and the Munich Chronotype Questionnaire (MCTQ), developed by Roenneberg's group. Both instruments ask about sleep preferences under unconstrained conditions — that is, when you have no external obligations. This matters because most people operate under social jetlag: they wake and sleep on socially imposed schedules that may be misaligned with their biology.

No. This is an educational tool, not a clinical assessment. For research-grade chronotyping, the full Munich Chronotype Questionnaire is available through the Roenneberg lab. That said, the questions here are drawn from validated instruments and will give a reliable indication of your chronotype direction.
This is called social jetlag — the discrepancy between your biological clock and your social clock. Many Wolves are forced to operate on early schedules by work, school, or family obligations. The quiz asks about your preferences under unconstrained conditions, which may differ from your actual schedule.
Yes. Chronotype is a continuous spectrum, and the four-category model is a simplification. If your score falls near the boundary between two types, you share characteristics of both. The dashboard allows you to manually select your chronotype if you want to experiment with different inputs.
Younger people tend to score more toward Wolf (evening type), while older adults tend toward Lion (morning type). This is a natural biological shift, not a personality change. If you are between 16 and 25, your result may be more evening-skewed than it will be in ten years.