Fig. 2.

Hypothetical examples of a bipartite network and a system of interconnected networks modelling the relationships between social networks and activity spaces. Alters are represented by blue circles. Individuals and groups are distinguished by the number of people represented in the circle. Places are represented by green rectangles. In bipartite networks, socio-spatial relationships are represented as dotted lines. These relations identify who is seen in which location. It shows, for example, that Child is only seen at Home, while Friend 1 is seen both at the Gym and at Work. It also shows that the Pharmacy is disconnected from the rest of the network, which means that the respondent does not see anyone from her network at that location. In interconnected networks, the relationships between people and visited locations are added: the social network (blue circles) is connected to the spatial network (green polygons) by who is seen at a given location (dotted lines). The edges between alters represent “who knows whom.” For example, Neighbour knows Child and Spouse. In comparison, Friend 2 is not connected, meaning he does not know any other alter. The edges between locations could represent different relationships (e.g. distance), but these are not defined by the respondent in VERITAS-Social. The respondent is not represented in either the bipartite or interconnected network, knowing that by definition, she is connected both to all people (she knows everyone in her network) and to all locations (she visits all locations). The length of the lines is not informative in these examples. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)