Chronotype · MEQ test
The MEQ test, explained
The Morningness–Eveningness Questionnaire (MEQ) is the standard self-report tool in sleep research for classifying chronotype. This page covers what it measures, how to score it, what the five bands mean, the evidence behind it, and how it compares to other chronotype instruments.
Want to take a free chronotype test now? Use the on-site 10-question quiz — items adapted from the MEQ and rMEQ pools, results in under three minutes, with classification, score, and tailored bedtime recommendations.
Background: what the MEQ measures
Chronotype is the phase of your internal circadian clock relative to clock time — most simply, whether you naturally peak earlier or later than the population average. The MEQ assesses this preference through 19 items covering preferred sleep and wake times, peak alertness windows, appetite timing, exercise preference, and how quickly you feel fully awake after rising.
Horne and Östberg designed the instrument to be validated against objective circadian markers. In the original 1976 paper they compared MEQ scores against oral temperature rhythms in 48 participants; scores correlated strongly with the timing of the daily temperature peak. Subsequent validation studies have replicated the relationship against Dim Light Melatonin Onset (DLMO) — the gold-standard circadian phase marker — with correlations typically in the 0.40 to 0.70 range, depending on study conditions and sample.
The MEQ is not a personality test. It is a behavioural proxy for a biological rhythm. Two people with identical extraversion scores can score at opposite ends of the MEQ.
The five MEQ bands
MEQ raw scores range from 16 (strongly evening) to 86 (strongly morning). Horne and Östberg defined five interpretation bands that have remained the convention since publication:
Strong lark profile. Naturally awake before 06:00 without an alarm; peak performance window typically 09:00–12:00. Bedtime preference before 22:00.
Mild lark. Preferred wake around 06:00–07:00, bedtime around 22:00–23:00. Most cognitive output in the late morning.
Third bird. The largest band in the general population. Flexible sleep timing; peak performance falls in the late morning to early afternoon.
Mild owl. Preferred wake after 08:00, bedtime after 23:30. Cognitive peak in the late afternoon to early evening.
Strong owl profile. Natural sleep onset after 00:30, free wake after 09:30. Peak performance window typically 17:00–21:00. Most affected by early required wake times.
How MEQ scoring works
Each of the 19 items has a small fixed set of answer choices, each weighted with a numeric score. Some items use a 1–5 Likert-style scale; others use clock-time intervals scored 1–5. The total raw score is the sum across all items, producing the 16–86 range above.
Most items ask about preferences rather than current behaviour — for example, the time you would ideally rise rather than the time you actually rise. This distinction matters: it makes the MEQ measure underlying preference even when imposed schedules force you into a different pattern. A confirmed owl working a 06:00 start time will still score as an owl on the MEQ.
Reverse-scoring is needed on roughly half the items where higher response values indicate evening preference. Online and validated paper implementations handle this automatically. The full scoring key is in the original Horne–Östberg paper and in Adan & Almirall's 1991 rMEQ paper for the short form.
MEQ vs rMEQ vs MCTQ
Three instruments dominate chronotype research. They measure related but distinct phenomena:
| Instrument | Items | Measures | Best for |
|---|---|---|---|
| MEQ (1976) | 19 | Preference | Clinical, historical comparison |
| rMEQ (1991) | 5 | Preference | Brief surveys, screening |
| MCTQ (2003) | 17 | Actual sleep timing | Population epidemiology, MSF |
For most personal use, the rMEQ (or the 10-question adaptation on this site) gives you the same chronotype band as the full MEQ in 85–90% of cases, at a fraction of the time.
Where to take the MEQ
For a quick free version, the 10-question quiz on this site classifies you into the three commonly used bands (lark, third bird, owl) in about three minutes. Items are adapted from the MEQ and rMEQ pools.
For research use, the full 19-item Horne–Östberg MEQ and its scoring key are available in the original 1976 paper (Int J Chronobiol, freely accessible via PubMed) and have been redistributed in dozens of academic papers since.
For clinical use, a sleep specialist will typically administer either the MEQ, the rMEQ, or the MCTQ depending on the question being investigated. None of these instruments diagnoses a sleep disorder; they describe one dimension of circadian phenotype.
Frequently asked questions
What is the MEQ?
The Morningness–Eveningness Questionnaire (MEQ) is a 19-item self-report instrument developed by Jim Horne and Olov Östberg in 1976 to classify a person's circadian preference along the morningness–eveningness continuum. It is the most widely used chronotype questionnaire in sleep research, with more than 6,000 citations in the peer-reviewed literature.
Is the MEQ test free?
The original questionnaire and scoring key were published in the open scientific literature (Horne & Östberg, 1976) and have been redistributed freely for educational use ever since. Several validated free implementations are available online. The 10-item chronotype quiz on this site uses items adapted from the MEQ and rMEQ pools and is also free.
How long does the MEQ take to complete?
About five to seven minutes for the full 19-item version. The reduced rMEQ short form (5 items) takes under two minutes and correlates 0.90+ with the full instrument.
What are the MEQ score bands?
Scores range from 16 to 86. Definitely morning type: 70–86. Moderately morning type: 59–69. Intermediate (neither type): 42–58. Moderately evening type: 31–41. Definitely evening type: 16–30. These bands have stayed essentially unchanged since the 1976 publication.
Is the MEQ scientifically valid?
Yes. The MEQ has been validated against multiple objective circadian markers including Dim Light Melatonin Onset (DLMO), core body-temperature minimum, peak performance time, and free-running sleep schedules in time-isolation studies. It correlates 0.40–0.70 with DLMO depending on study design — moderate-to-strong agreement for a self-report instrument.
What is the difference between MEQ and rMEQ?
The reduced MEQ (rMEQ, Adan & Almirall 1991) is a 5-item short form selected from the full 19-item MEQ for highest correlation with total score. The rMEQ is preferred when survey length matters but loses some sensitivity in the extremes of the distribution. For most personal use the rMEQ is sufficient.
What is the difference between MEQ and the Munich ChronoType Questionnaire (MCTQ)?
The MEQ asks about preferences (when you would ideally do X). The Munich ChronoType Questionnaire (MCTQ, Roenneberg 2003) asks about actual sleep timing on workdays and free days, and computes chronotype from the mid-sleep point on free days (MSF). The MCTQ is preferred for population epidemiology because it produces a continuous numeric chronotype; the MEQ is preferred for clinical and historical comparison.
Can I take the MEQ multiple times?
Yes. Chronotype is biologically stable in adults over short periods (months) but shifts predictably with age (earlier after about 25) and can drift under chronic schedule pressure. Test–retest reliability of the MEQ over 8 weeks is high (r > 0.85) in unstressed conditions.
Does the MEQ work for shift workers?
The MEQ asks about preferences regardless of imposed schedule, so it remains technically valid for shift workers — but interpretation has to account for the fact that a shift worker's biological clock may be partially adapted to their schedule. Compare the MEQ result against a recent vacation week's natural sleep timing for a sanity check.
Does the MEQ work for teenagers and older adults?
Yes, but age-adjusted norms are useful. Adolescents trend 1–2 hours later than adult norms (peak eveningness around age 19–20). Adults over 60 trend earlier. The raw MEQ score is comparable across ages; the interpretation of 'late' or 'early' depends on the age-appropriate reference distribution.
Is the four-animal chronotype quiz (lion, bear, wolf, dolphin) the same as MEQ?
No. The four-animal model is a 2016 trade-book framing by Michael Breus without peer-reviewed validation. It overlaps conceptually with MEQ but uses different category boundaries and is not directly comparable. For scientific work the MEQ remains the standard.
What should I do with my MEQ result?
Use it as one input among several. Practical applications: schedule important cognitive work in your high-alertness window, time exercise 4–6 hours before sleep, set an evidence-based bedtime, and consider chronotype mismatch with your work schedule (social jet lag) as a candidate explanation for chronic fatigue. The MEQ is educational; it is not a clinical diagnosis.
Primary sources
- Horne JA, Östberg O. A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms. Int J Chronobiol, 1976
- Adan A, Almirall H. Horne & Östberg morningness-eveningness questionnaire: a reduced scale. Pers Individ Dif, 1991
- Roenneberg T et al. Life between clocks: daily temporal patterns of human chronotypes. J Biol Rhythms, 2003 (introduction of MCTQ)
- Jones SE et al. Genome-wide association analyses of chronotype in 697,828 individuals. Nat Commun, 2019
Related
- Chronotype quiz (10 questions, free)
- Sleep calculator — bedtime based on chronotype-adjusted cycles
- Shift work guide — chronotype determines which shift patterns damage you least
- Jet lag planner — chronotype affects recovery direction