Sybil B. G. Eysenck, wife of the late author Hans Eysenck, is co-director of Personality Investigations, Publications and Services (PIPS), an organization devoted to the promotion of the writings and research of Hans J. Eysenck. She is the co-author, with Hans Eysenck, of "Psychoticism as a Dimension of Personality" and "Personality Structure and Measurement" and the co-editor, with Donald Saklofske, of "Individual Differences in Children and Adolescents".