This authoritative handbook provides a cutting-edge overview of classic and current research as well as an assessment of future trends in the field of intraindividual processes. After outlining a set of integrative perspectives — evolutionary and cultural, developmental, and methodological — it goes on to provide an in-depth treatment of current research on social cognition and social motivation. The handbook concludes with chapters devoted to research on applying cognitive and motivational principles. — 28 specially commissioned chapters offer unparalleled coverage of the whole field of intraindividual processes — A carefully chosen team of authors from around the world ensure a truly international perspective — Fully referenced chapters include bibliographies for easy access to further study. This handbook is essential reading for upper-level students looking for succinct overviews and for researchers seeking an authoritative definition of the field which also indicates likely future trends.