Empatía, amistad, cooperación, competición, niños, adolescentes.
In this study the effects of affective variables such as empathy, anxiety, and friendship in cooperative or competitive interactions are analysed from a developmental point of view. The aims of the study were to analyse the influence of empathy and anxiety on cooperative interactions; to explore developmental differences on subjects� cooperative courses of action when the existing relation was of mutual friendship or rejection. Interactions were analysed by means of the �Lag Sequential Analysis� (Sackett, 1980) in order to learn more about subjects� interactive processes. Different behavioural patterns were obtained for children and adolescents on the basis of the empathy and friendship that existed between subjects