Abstract: | The study is based on the domain approach to the social norms and it investigated whether preschool children's references to social norms are related to their language expression. Children aged 3;8–7;5 years (N = 73; 35 boys and 38 girls) participated and were video-recorded playing in triads for 20 minutes. The norms mentioned were coded as moral or conventional rules according to Piotrowski's (1997 Piotrowski, C. 1997. Rules of everyday family life: The development of social rules in mother–child and sibling relationships. International Journal of Behavioral Development, 21: 571–598. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) coding system. Older children and more talkative children mention more conventional rules (p < .05 and p < .001, respectively); boys tend to refer to moral rules more often than girls, yet the use of moral rules was not influenced by age or talkativeness of the child. This supports the idea that children treat social norms of different domains differently: the use of moral rules does not seem to be influenced by the characteristics of the child, while the references to conventional rules depend on the age and talkativeness of the child. |