Abstract
This essay draws together deception detection research and explains its relevance to decision‐making in today's social milieu. Major areas of research focus are described including the differential effects of observational conditions, the correspondence between perceived and actual signs of deception, training observers to detect deception, and communicating with suspected deceivers. Communicator relationships, observer characteristics and observer professions are considered in relation to accurate deception detection, as is overall confidence in the ability to detect deception. Implications are drawn for legal, organizational, sales, medical and relational settings.