¿Influyen el sexo y el temperamento en los cambios en la expresividad emocional de infantes chilenos? Un estudio longitudinal

Emotional expressiveness is relevant for healthy functioning, and in the early years, both maturational and cultural aspects are configuring it. This study analyzed the change in emotional expressiveness in 99 children between 12, 18, 24 and 30 months of age, considering the ability to express pleasure and frustration and its intensity. The children's emotional expressiveness was assessed against tasks that elicited pleasure and frustration, and the IBQ-R-VSF was applied to evaluate temperament. It was observed that over time the number of children who expressed frustration decreased significantly. Furthermore, the intensity with which the children expressed pleasure and frustration also showed a significant reduction. Profiles were obtained that combined children's gender and temperament, and that showed different patterns of change in the emotional expressiveness of the children. These results are discussed from the perspective of the socialization of positive and negative emotions in Chilean culture.