Fig. 1. Overview: quantifying a behavioral signature of social value.

A Participants were asked to list potential activities that they could complete with other individuals in whatever level of detail they wish. Members of the research team consolidated activities into broader categories (e.g., ‘Watching The Sopranos’ or ‘Watching Love is Blind’ become ‘Watching television’). B An independent set of participants completed best-worst ratings of activities in a traditional maximum difference design that allows for (C) derivation of activity weights that produces a behavioral signature of social value. The signature is applied by having novel participants rate how likely they are to complete each activity in the signature with a given social partner, such as a parent or friend (D), then taking the dot product of these likelihood ratings and activity weights (E), yielding a scalar value quantifying the social value that a given participant ascribes to their relationship with a given a social partner. Social value scores were validated in series of statistical analyses involving behaviors and attitudes towards others (F) across exploratory and confirmatory samples. For robustness, two separate sets of activities were sourced and weighted.