EN
One of the most influential theories of explaining the relations between children's family experiences and their social development is attachment theory. The aim of the study was to examine the concurrent connection between the internal working model of attachment relationships and social relations with peers at the age of five. The representations of attachment were assessed by the Seattle version of the Separation Anxiety Test. The peer group relations (popularity, rejection, friendship quality, loneliness) were evaluated using the sociometric method. The results showed that there is a relative predictive power of the child-parent attachment to the domain of social relations with peers. Specifically we found connection between the internal working model of attachment relationships and popularity, friendship quality and loneliness with peers.