We are constantly forming impressions about those around us. Social interaction depends on our understanding of interpersonal behavior - assessing one another's personality, emotions, thoughts and feelings, attitudes, deceptiveness, group memberships, and other personal characteristics through facial expressions, body language, voice and spoken language. But how accurate are our impressions and when does such accuracy matter? How is accuracy achieved and are some of us more successful at achieving it than others? This comprehensive overview presents cutting-edge research on this fast-expanding field and will be essential reading for anyone interested in the psychology of interpersonal perception. A wide range of experts in the field explore topics including age and gender effects, psychopathology, culture and ethnicity, workplaces and leadership, clinicians' skills, empathy, meta-perception, and training people to be more accurate in their perceptions of others.