The Thesaurus contains the vocabulary used by the American Psychological Association when indexing all of its electronic databases in order to maintain consistency. The 11th edition contains 214 new postable index terms (listed together in a table) and revision of many terms, either to include retrospective indexing, to change their spelling or text, or to delete them because of insufficient use or overlap with other terms. This is an essential guide for psychologists, researchers, librarians, and students in the field. Annotation ©2008 Book News, Inc., Portland, OR (booknews.com)