The population of Polish Students, who graduated from high schools/ passed leaving exams, started university studies between 2020 and 2023, and were living in Poland during this period (2020-2023: COVID-19, lockdown, economic crisis, political changes, climate changes, and the war in Ukraine).

Assessment of psychological functioning (including well-being, mental health conditions, coping skills), and socio-demographics, academic performance, home, relationships, general health, habits, and attitudes.

Global Flourishing Study Questionnaire Development Report (GFS). The GFS includes 12 questions that gauge respondents' level of "flourishing" across six domains: (1) happiness and life satisfaction, (2) mental and physical health, (3) meaning and purpose, (4) character and virtue, (5) close social relationships and (6) financial and material stability.

Personality Inventory for ICD-11 (PiCD). The four-factor structure of the Polish version of PiCD consists of three unipolar factors as Negative Affectivity, Detachment, and Dissociality factors, and one bipolar Anankastia vs. Disinhibition factor.

The Difficulties in Emotion Regulation Scale (DERS). It comprises the following dimensions: (1) lack of acceptance of emotional responses, (2) difficulties in realizing goal-directed behaviors, (3) difficulties in controlling impulses, (4) lack of emotional awareness, (5) limited access to emotion regulation strategies, (6) lack of emotional clarity

Meaning in Life Questionnaire (MLQ). A 10-item questionnaire designed to measure two dimensions of meaning in life: (1) Presence of Meaning (how much respondents feel their lives have meaning), and (2) Search for Meaning (how much respondents strive to find meaning and understanding in their lives).

Survey of socio-demographic data (gender, age, sexual orientation, marital status, family, relationships, socio-economic status, place of residence, educational level, habits, attitudes, others)