<p>This study investigates interaction in eight sibling pairs aged 1-5 years with the purpose of examining the prevalence of certain variables constituting the interaction. The siblings were observed with video camera while playing with a toy brought along by the author. In order to validate and expand upon the information obtained from the observations, the parent(s) were asked to respond to a number of questions from a Questionnaire. The variables investigated were reciprocal and complementary interaction, asymmetrical roles, imitation, conflict, joint and parallel play and communication. The results obtained indicate that, in these eight sibling pairs, reciprocal interaction, that is interaction taking place on an equal level, is signified by joint play. Complementary interaction, that is interaction taking place on different levels, is signified by parallel play. High activity level for boys versus low activity level for girls in three sibling pairs were observed to correspond to gender-specific play activities in everyday life.</p>

This study investigates interaction in eight sibling pairs aged 1-5 years with the purpose of examining the prevalence of certain variables constituting the interaction. The siblings were observed with video camera while playing with a toy brought along by the author. In order to validate and expand upon the information obtained from the observations, the parent(s) were asked to respond to a number of questions from a Questionnaire. The variables investigated were reciprocal and complementary interaction, asymmetrical roles, imitation, conflict, joint and parallel play and communication. The results obtained indicate that, in these eight sibling pairs, reciprocal interaction, that is interaction taking place on an equal level, is signified by joint play. Complementary interaction, that is interaction taking place on different levels, is signified by parallel play. High activity level for boys versus low activity level for girls in three sibling pairs were observed to correspond to gender-specific play activities in everyday life.