RT Journal Article T1 Personality trait analysis during the COVID-19 pandemic: a comparative study on social media A1 Fernández Pichel, Marcos A1 Aragón Saenzpardo, Mario Ezra A1 Saborido Patiño, Julián A1 Losada Carril, David Enrique K1 COVID-19 K1 Social media K1 Big-5 K1 Personality analysis K1 Emotion analysis AB The COVID-19 pandemic, a global contagion of coronavirus infection caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), has triggered severe social and economic disruption around the world and provoked changes in people’s behavior. Given the extreme societal impact of COVID-19, it becomes crucial to understand the emotional response of the people and the impact of COVID-19 on personality traits and psychological dimensions. In this study, we contribute to this goal by thoroughly analyzing the evolution of personality and psychological aspects in a large-scale collection of tweets extracted during the COVID-19 pandemic. The objectives of this research are: i) to provide evidence that helps to understand the estimated impact of the pandemic on people’s temperament, ii) to find associations and trends between specific events (e.g., stages of harsh confinement) and people’s reactions, and iii) to study the evolution of multiple personality aspects, such as the degree of introversion or the level of neuroticism. We also examine the development of emotions, as a natural complement to the automatic analysis of the personality dimensions. To achieve our goals, we have created two large collections of tweets (geotagged in the United States and Spain, respectively), collected during the pandemic. Our work reveals interesting trends in personality dimensions, emotions, and events. For example, during the pandemic period, we found increasing traces of introversion and neuroticism. Another interesting insight from our study is that the most frequent signs of personality disorders are those related to depression, schizophrenia, and narcissism. We also found some peaks of negative/positive emotions related to specific events PB Springer SN 0925-9902 YR 2023 FD 2023-08-23 LK http://hdl.handle.net/10347/31002 UL http://hdl.handle.net/10347/31002 LA eng NO Fernández-Pichel, M., Aragón, M.E., Saborido-Patiño, J. et al. Personality trait analysis during the COVID-19 pandemic: a comparative study on social media. J Intell Inf Syst (2023). https://doi.org/10.1007/s10844-023-00810-3 NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. The authors thank the support obtained from: i) project PLEC2021-007662 (MCIN/AEI/10.13039/501100011033, Ministerio de Ciencia e Innovación, Agencia Estatal de Investigación, Plan de Recuperación, Transformación y Resiliencia, Unión Europea-Next GenerationEU), ii) project PID2022-137061OB-C22 (Ministerio de Ciencia e Innovación, Agencia Estatal de Investigación, Proyectos de Generación de Conocimiento; suppported by the European Regional Development Fund) and iii) Consellería de Educación, Universidade e Formación Profesional (accreditation 2019-2022 ED431G-2019/04, ED431C 2022/19) and the European Regional Development Fund, which acknowledges the CiTIUS-Research Center in Intelligent Technologies of the University of Santiago de Compostela as a Research Center of the Galician University System DS Minerva RD 27 abr 2026