Background: The facilitating role of sleep for language learning is well-attested in adults and to a lesser extent in infants and toddlers. However, the longitudinal relationship between sleep patterns and early vocabulary development is not well understood. Methods: This study investigates how measures of sleep are related to the development of…

The goal of the study was to examine the joint and distinct contribution of attachment security and social anxiety to Arab children's peer competence in middle childhood. We focused on Arab children as very little research has examined close relationships for this group. A sample of 404 third-, fourth- and fifth-grade Arabic students (203 boys and…