Hardin's research focuses on the interpersonal foundations of cognition, including the self-concept, social identification, prejudice and ideology. Most of his work is animated by shared reality theory (Hardin & Conley, 2001; Hardin & Higgins, 1996). From this perspective, individual cognition and interpersonal relationships are mutually constructed and regulated through the achievement of "shared reality," which is a kind of working intersubjectivity.