There is more to chronotypes than evening and morning types: Results of a large-scale community survey provide evidence for high prevalence of two further types

Evidence is accumulating for the possibility to distinguish more than two distinct chronotypes, i.e., people would be neither morning nor intermediate nor evening types. We tried to establish four-type division into distinct chronotypes without implying any chronotypological questionnaire. A community-based online survey (n = 1305) included a visuo-verbal judgment task for evaluating how sleepy a survey participant thinks he/she would be at...