The Emotion Expression Scale for Children (EESC) is a 16-item self-report questionnaire assessing children's difficulties in emotion expression (i.e., poor emotion awareness and reluctance to express emotions). Considering the inconsistent findings regarding its factorial structure and dimensionality, this study aims to explore the factor structure and psychometric properties of the EESC in a sample of 286 Portuguese children (8-12 years). Three competing models were analyzed through confirmatory factor analysis (correlated two-factor model, one-factor model, and bifactor model). The bifactor model provided a better fit than the competing models, and the results suggested a strong general factor of "difficulties in emotion expression." The validity of the EESC was also indicated by its positive correlations with variables assessing child anxiety, depression, and behavioral avoidance and its negative correlation with mindfulness skills. The EESC is a valid measure of children's difficulties in emotion expression and the use of its total score is recommended.
Keywords: bifactor model; children; emotion expression; factor structure.