In this volume, the major theorists and researchers of interpersonal sensitivity describe their approaches both critically and integratively. Specific tests and methods are presented and evaluated. The authors address issues ranging from the practical to the broadly theoretical and discuss future challenges. Topics include sensitivity to deception, emotion, personality, and other personal characteristics; empathy; the status of self-reports; dyadic interaction procedures; lens model approaches; correlational and categorical measurement approaches; thin-slice and variance partitioning methodologies; and others.