Redefined: The APA Dictionary of Psychology

We’re excited to announce a recent major update to the APA Dictionary of Psychology! Notable as the first content update since the final publication of the print version in 2015, this release features a number of benefits, including

  • revisions of 1,500+ terms related to gender and sexuality; race, ethnicity, and culture; aging and older adulthood; and disabilities and disorders
  • alignment with the APA Inclusive Language Guide and additional APA resources, including removal of binary wording to promote gender inclusivity
  • updated DSM-5-TR diagnostic terminology, and
  • date information for each entry’s most recent update.

With more than 25,000 authoritative entries spanning 90 psychology subfields, this web-based tool is freely available at https://dictionary.apa.org.

Users who access APA PsycArticles on APA PsycNet have integrated access to the dictionary when viewing the HTML version of full-text APA journal articles. Look for the dotted blue underline that links to the dictionary entry.

Definitions are also accessible and highlighted in search engine results. Quickly look up a term from anywhere by typing the word/phrase you want to look up into your browser’s search bar and look for the APA Dictionary in the results.

Screenshot of APA Dictionary of Psychology entry gate-control theory

TIP: Typing dictionary.apa.org or APA Dictionary followed by your desired term into your browser’s search bar may return the APA Dictionary entry as one of the top search results, depending on your search engine (e.g., Googling dictionary.apa.org gate control hypothesis or searching DuckDuckGo for APA dictionary gate control hypothesis returns the APA Dictionary entry for gate-control theory).


The APA Dictionary in Psychology is a landmark reference for terminology in psychology and the behavioral sciences, beginning with its print publication in 2007 and transitioning into an online resource in 2018. To learn more, check out the companion blog post Look up Psychology Terms in the APA Dictionary of Psychology or visit the APA Dictionary to explore on your own!

Training Alert: APA PsycInfo Spring Webinars for Students, Faculty, and Researchers

Interested in strengthening your APA database searching skills? Join us for the next round of APA PsycInfo® webinars designed for students, faculty, and anyone else who wants to learn more about how to search APA PsycInfo more effectively!

The 30-minute APA PsycInfo – Basic Search session includes live search demos and provides search tips and strategies to help you locate more relevant results in less time.

The 30-minute APA PsycInfo – Advanced Search session explores a few of the added-value fields in APA PsycInfo and using them to uncover much more than journal articles. Search demos will demonstrate how to identify what research is happening at which institutions; finding new journals in which to publish your work; information about tests used in related research; and potential funding opportunities for your project.

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New Thesaurus Terms for Searching APA PsycInfo (Winter 2022)

APA PsycInfo: The premier abstracting and indexing resource for behavioral and social science research

In January, APA added 44 new terms to its Thesaurus of Psychological Index Terms® to provide more effective searching on current topics, including sport and exercise psychology, psychological testing, mental health, and COVID-19. This update, which includes 27 new cross-referenced terms and 22 revised scope notes, brings the total number of index terms in the Thesaurus to more than 10,000.

In order to provide current and accurate search terminology for emerging research, the winter update will be followed by two additional Thesaurus updates in 2022 — one in the spring (May) and another in the fall. New terms from the winter and spring updates will be applied to current content only, but the majority of postable terms new for 2022 will be back-mapped to older records following the fall release.

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New Terms & Other Updates to the Thesaurus of Psychological Index Terms®

We recently released an update to the Thesaurus of Psychological Index Terms. The Thesaurus provides precise and consistent terminology for searching all APA research databases. We added 305 new “preferred” Index Terms and approximately 70 new non-postable or “use” references*.

Each item in the APA databases – journal articles, books and book chapters, dissertations, and more – is represented by a record that is indexed, or tagged, with Index Terms from the Thesaurus. The use of a controlled vocabulary allows someone searching a database to quickly find all items about a specific concept — such as Animal Behavior, Marginalized Groups, or Prescription Drug Misuse — no matter what terminology or keywords the authors used. 

Reflecting emerging areas, technologies, and social issues as well as changing nomenclature, this updated vocabulary will provide users with more targeted and efficient search and discovery. Additionally, we added new terminology in the expanding areas of psychological assessment, psychometrics, and research methods. You can view more details on our web page, What’s New in the 2019 Update, including a link to the full list of new and updated Index Terms (PDF, 135KB).

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