A measurement of some aspect of psychological systems for social processes e.g. those that mediate responses in interpersonal settings of various types, including perception and interpretation of others’ actions.  Based on the NIH NIMH's research domain criteria (RDoC).  https://www.nimh.nih.gov/research-priorities/rdoc/definitions-of-the-rdoc-domains-and-constructs.shtml. The trait is Experimental Factor Ontology identifier EFO_0009100 (social domain measurement).