In the context of relational items in the cluster visualization, family members are added under what condition?

In the context of relational items in cluster visualization, family members are added irrespective of the cluster association, which means that their inclusion is not dependent on which cluster they are part of. This approach allows for a broader understanding of the relationships among items, providing a more comprehensive overview of how different family members relate to one another.

Adding family members regardless of their cluster assignment supports the idea that relevant documents can share important relational attributes, even if they are grouped into different clusters. This can help in identifying connections that may not be immediately apparent if the focus were solely on their cluster association. It enhances the analysis by allowing a wider perspective on the data, which is crucial in relational data visualization, ensuring that relationships and connections are not missed simply because items are categorized in separate clusters.