About
I’m a psychologist and researcher in academia in Iceland, with a strong interest in how technology and psychology, particularly mental health, interact at both the individual and societal level, presenting both opportunities and challenges. I also have clinical experience, particularly in cognitive behavioral therapy, with a focus on diagnosing and treating depression, anxiety disorders, stress, and anger management. Alongside this, I’m deeply interested in data, statistics, and research methodology, as well as broader questions in the philosophy of science, conceptual analysis in psychology, and the philosophy of mind. I am available for lectures on these topics and more. If you are interested in booking me or exploring a collaboration, feel free to get in touch.
Research
- Adolescence mental health and online communication
- Cardiorespiratory fitness trends and psychosocial outcomes
- Psychometrics, statistics, data analysis and methodology
Selected Publications
- Birgisson, O., Hysing, M., Eriksen, H. R., Johannsson, E., & Gestsdottir, S. (2023). The relationship between online communication and adolescents’ mental health: Long-term evaluation between genders. Scandinavian Journal of Public Health, 52(4). https://doi.org/10.1177/14034948231161382
- Birgisson, O., Eriksen, H. R., Hysing, M., Johannsson, E., & Gestsdottir, S. (2024). Adolescent mental health and cardiorespiratory fitness: A comparison of two cohorts 12 years apart. PLOS One, 19(5). https://doi.org/10.1371/journal.pone.0300810
- Birgisson, O., Johannsson, E., Eriksen, H. R., Hysing, M., & Gestsdottir, S. (2025). The relationship between online communication and mental health and cardiorespiratory fitness from ages 15 to 17: A longitudinal cohort study. BMC Public Health, 25, 587. https://doi.org/10.1186/s12889-025-21833-1