Figure 7.

Mean size of conversation groups (unfilled symbols) and laughter groups (filled symbols) plotted against the size of the social group within which these are embedded. A laughter group is defined as all the individuals who are laughing together; conversation group size is defined as all the individuals actively engaged in a conversation with each other, either as speaker (there is only ever one) or attentive listeners; a social group includes everyone forming part of a coherent interactional group (e.g. sitting around the same table at a pub). Sample based on 450 social groups in UK, France and Germany. Source [79].