Implicit and Explicit Stigma of Chronotype in Emerging Adults

Individuals with poor sleep (e.g., insomnia) and mental health (e.g., depression) experience negative stigma but no studies have examined the relationship between stigma and evening chronotype. The present mixed methods study aimed to assess and describe explicit and implicit attitudes about evening and morning chronotypes in a sample of emerging adults.

49 undergraduates (M_age = 19.9 [SD = 1.5], 83.7% female).

Participants completed self-reports of demographics and chronotype. Attitudes about "night owls" and "early birds" were measured with self-report questionnaires (explicit attitudes) and an Implicit Association Task (implicit attitudes). Participants described associations with evening and morning chronotypes in free-text responses, which were qualitatively coded.

We found evidence of implicit bias against night owls and for early birds. The positive mean implicit d score was 0.57 (SD = 0.47), indicating a moderate implicit bias for pairing "bad" with "night owl" and "good" with "early bird." No baseline characteristics, including chronotype, were significantly associated with implicit bias. Analyses of explicit bias revealed participants perceived night owls as significantly more lazy, unhealthy, undisciplined, immature, creative, and young. Analysis of free-text responses provided further evidence of these associations.

Consistent with hypothesis, undergraduates demonstrated predominantly negative implicit and explicit stigma toward evening chronotypes compared to morning types. As stigma can lead to adverse consequences, future studies should assess the impact of negative societal and self-stigma on evening types. Consideration of societal stigma within clinical intervention contexts could have the potential to reduce shame or other emotions that interfere with sleep.