Th e study is based on the research analyses of K.V. Petrides' (2011) trait emotional intelligence construct verifi ed by his Trait Emotional Intelligence Questionnaire-TEIQue. Verifi cation of the EI trait construct by stepwise regression analysis confi rmed that it is determined only to a certain extent by the Big Five personality factors theory (14%) (by the TIPI questionnaire, Gosling, 2003) and by perception and experiencing of positive (15%) and negative (13%) mental states (by the SEHW questionnaire, Džuka & Dalbert, 2002). Th us, the emotional intelligence trait as a consistent construct partially captures individual variability of emotional aspects otherwise scattered across personality theories.