In the article, we present an innovative approach to measuring chronotypes using cluster analysis and the MESSi questionnaire—a tool designed to capture the multidimensional nature of circadian rhythms. By analyzing extensive data from Poland and Germany, we identified four distinct chronotype categories, differing in sleep parameters, personality traits, self-regulation, and aspects of mental health.

My project entitled “Mechanisms reducing the adverse effects of evening circadian preference: a longitudinal and experimental perspective” has received funding from the National Science Centre in Poland!

Our recent research provides evidence for the negative social perceptions of evening chronotypes. However, there has been a lack of studies indicating whether negative, socially shared beliefs may become internalized in negative self-perceptions of evening-types. In our new publication we provides an empirical analysis of the role of self-liking and self-competence in the associations between chronotype and both depressiveness and well-being. Results show that evening-types scored lower in self-liking, self-competence and subjective well-being, and higher in depressive symptoms than morning-types. Moreover, we obtained significant mediation effects, showing that the relationship between chronotype and subjective well-being might stem from the lower levels of self-liking and self-competence among evening-types, and that the relationship between chronotype and depressive symptoms might stem from the lower level of self-liking among evening-types.

In our publication, we show a positive association between eveningness and perceived discrimination. Moreover, perceived discrimination partly mediated the associations between morningness-eveningness and both positive affect and negative affect. Our results provide evidence that the experience of stigmatization due to one's chronotype has consequences for mental health and well-being.

I am taking part in the FSL course organized by the University of Oxford and learning about the theory and practice of using this software for structural, functional, and diffusion image analysis.

In recent days I participated in the International Society for the Study of Individual Differences (ISSID) 2023 conference where I presented a poster entitled "The mediating role of self-liking and self-competence in the association between chronotype and mental health" and gave an oral presentation entitled "Factors protecting against the negative effects of eveningness: the role of personality, mindfulness, religiosity, and social support" during our Australian-Italian-Polish symposium.

In June, I defended my doctoral dissertation entitled "Factors protecting against the negative effects of eveningness: the role of individual differences, mindfulness and perceived social support" with distinction!

In this article, we present the Polish adaptation of the MESSi chronotype questionnaire and show the relationship between higher-order personality factors and three chronotype dimensions.

I became a laureate in the START 2023 program! The aim of the program is to support outstanding young scientists and encourage them to further scientific development.

I have submitted my PhD thesis entitled "Factors protecting against the negative effects of eveningness: the role of individual differences, mindfulness and perceived social support". Just waiting for the reviews!

New article about the moderating effects of religiosity on the relationship between eveningness and depressive symptoms. We show that religiosity may act as a protective factor against elevated depressive symptoms among evening-oriented individuals.

Animated educational video about chronotype presenting results of my research, sponsored by the Excellence Initiative - Research University program of the University of Warsaw.

New article about the social perceptions of morning and evening chronotypes using the framework of the stereotype content model. We show that in the entire sample, M-types were perceived as more competent and warmer than E-types. When we considered the perceivers’ own chronotypes, only the perceptions reported by N-types were consistent with that pattern. M-type perceivers displayed analogic albeit markedly stronger positive views of their ingroups, whereas E-types believed that individuals sharing their diurnal preference are equally competent but warmer than M-types.

This summer, I am learning advanced statistical methods in Ann Arbor, Michigan during the four-week ICPSR Summer Program.

Interested in how perceived social support contributes to greater well-being in morning- oriented individuals? Check out our new longitudinal study in the Journal of Sleep Research!

In the study, we explored the moderating effects of dispositional mindfulness on the relationship between morningness-eveningness and the presence of depressive symptoms, as well as between morningness-eveningness and the presence of anxiety symptoms. We show that dispositional mindfulness may act as a protective factor against the elevated depressive and anxiety symptoms reported by evening-oriented individuals.

We observed a significant seasonal shift towards morningness and lower depressive symptoms from December to June. We show that seasonal shifts in chronotype and depressive symptoms were interrelated: a seasonal shift towards morningness was associated with a decrease in depressive symptoms. The strength of this association was amplified by neuroticism but attenuated by conscientiousness, suggesting that among more neurotic individuals seasonal changes in depressive symptomatology are more dependent on seasonal shifts in morningness-eveningness but less dependent among conscientious ones.

If you are interested, be sure to check out the article about our research!

In this present study, we explored the mediational role of general social support and its facets (family, friends, and significant others) in the relationship between morningness–eveningness and subjective well-being. Our results show that the association between morningness-eveningness and subjective well-being might, at least in part, stem from the higher levels of social support perceived by morning-oriented individuals.

We show that temperamental traits, namely high briskness and low emotional reactivity attenuate the association between eveningness and depressive symptoms.

In the article, we show that even though evening-oriented individuals are usually more prone to depression, this association is practically non-existent in individuals that are also conscientious and non-neurotic.

We show that more neurotic adolescents become more evening-oriented, while those with higher emotional stability become more morning-oriented.