Abstract
The video observation tool CAVScene archives an observer's marking and segmentation of a critical scene from
background data. Using previously recorded observational data on toddlers' peer play, we analyzed the trends in
clip segmentation and the recorded play interactions to investigate aspects of toddlers' peer play. Both long and
short video clips showed how toddlers continue their peer play in a fluid manner. In play that continued at the same
place, toddlers enjoyed the change brought about by outsiders, although the theme of the play was not shared by
all. In play that continued with the same people, toddlers expressed their intentions in various ways. This behavior
was more predominant among 2–year–old toddlers. The short clips, which more often included 1–year–old toddlers,
captured spontaneous cooperation and children's fascination with peers' play. These results were derived by
expanding the media using this new video observation tool.
