Psychometric properties of WLEIS as a measure of emotional intelligence in the Portuguese and Spanish medical students.

The psychometric properties of Wong and Law's (2002) Emotional Intelligence Scale (WLEIS) were analyzed. Participants were 954 medical students: 481 from the University of Extremadura (Spain) and 473 from the University of Lisbon (Portugal). Following Messicks' validation framework, we analyzed the scale's response process, internal structure and relationship with other variables (i.e., engagement). Descriptive statistics, scale reliability, item characteristics, and exploratory and confirmatory analyses supported the distribution of the sixteen items across four factors. Convergent validity analyzed through the ρvc (η) index showed that all the factors were in the 50% criterion. The factors shared, on average, 23% of the variance showing adequate discriminant validity. Furthermore, the correlations among EI dimensions and engagement were all positive and significant. Overall, the WLEIS demonstrated good psychometric properties. Thus, this study ensures that WLEIS is a valid instrument in Portugal and Spain to evaluate EI in medical students.