This volume presents, in an integrated framework, contemporary perspectives on the role of nonverbal behavior in psychological regulation, adaptation, and psychopathology, and includes both empirical and theoretical research that is central to our understanding of the reciprocal influences between nonverbal behavior, psychopathology, and therapeutic processes. It has several objectives: One is to present fundamental theories and data relevant to researchers and clinicians working in such fields as psychopathology and psychotherapy. Another objective is to link contributions of basic research to clinical applications. Finally, the volume gathers contributions in different sub-fields that are rarely presented jointly, such as brain damage and non-verbal skills.