APA's PsycInfo is renowned for its extensive database thesaurus, officially called the APA Thesaurus of Psychological Index Terms. Identifying the right subject terms to use in the database can help to focus a search, and find the articles that are the best fit for your psychology research.
A thesaurus provides a standard language or set of terms with which to describe a subject area. Applied to indexing of a database, it indicates to a searcher which terms to use to retrieve the maximum number of relevant documents.
