Chronotype

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Chronotype is a set of parameters that describe an individual's sleep control system. In particular, biological characteristics that affect the timing, duration, and rhythmicity of sleep are of paramount interest. In popular parlance, the chronotype determines if a person is a lark, owl, long-sleeper, irregular sleeper, DSPS, etc.

It is relatively easy to determine the chronotype by the analysis of one's own habits, however, it is very hard to formulate a universal questionnaire due to a huge array of interfering factors, and variable interdependencies. Most of all, the same chronotype may express drastically different characteristics in different lifestyles.

This glossary entry is used to explain "Good sleep, good learning, good life" (2017) by Piotr Wozniak

Four examples of sleep logs that illustrate that modern human sleep patterns are as varied as snowflakes
Four examples of sleep logs that illustrate that modern human sleep patterns are as varied as snowflakes

Figure: Four examples of sleep logs that illustrate that modern human sleep patterns are as varied as snowflakes