Including more than 11,000 definitions, this authoritative and up-to-date dictionary covers all branches of psychology. Clear, concise descriptions for each entry offer extensive coverage of key areas including cognition, sensation and perception, emotion and motivation, learning and skills, language, mental disorder, and research methods. The range of entries extends to related disciplines including psychoanalysis, psychiatry, the neurosciences, and statistics. Entries are extensively cross-referenced for ease of use, and cover word origins and derivations as well as definitions. More than 100 illustrations complement the text.