What is a thesaurus search?
A thesaurus search is a search that involves the use of APA's Thesaurus of Psychological Index Terms.
What is the Thesaurus of Psychological Index Terms?
It is a list of subject terms prepared by the American Psychological Association and used broadly in the areas of psychology and the behavioral sciences. The thesaurus is a controlled vocabulary used to describe content variations in a standardized way. This controlled vocabulary is used by APA staff to describe the items included in APA PsycInfo and index their bibliographic records.
When should I use the thesaurus search?
You will find the thesaurus search particularly helpful, if you are a new researcher, as it will help you discover terminology that is used in psychological literature. You will also find it useful, if you wish to search for a concept, for which there are multiple variations. Since the thesaurus maps each one of the variations to a single index term (also referred to as a subject term) running a thesaurus search prevents you from having to search for each variation separately. Lastly, using the thesaurus search allows you to search for relevant items without having to rely on the terminology or keywords used by individual authors.
How can I run a thesaurus search?
To run a thesaurus search, just follow the steps described below:
1. Click on the "APA Thesaurus of Psychological Index Terms" link from the command bar at the top of the page.
![Screenshot highlighting the "APA Thesaurus of Psychological Index Terms" link](https://libapps-eu.s3.amazonaws.com/customers/404/images/Thesaurus_search_1.png)
2. Enter your search term in the thesaurus search box (i.e., the second box on the page) and click "Browse". Notice that if your term is not included in the thesaurus, you will be taken to the closest term alphabetically. Also, note that if your term is no longer used, you will be prompted to use the respective term that has replaced it.
![Screenshot highlighting the thesaurus search box](https://libapps-eu.s3.amazonaws.com/customers/404/images/Thesaurus_search_2.png)
3. Click on the term to see its broader, narrower, and related terms.
![Screenshot highlighting the term "psychoanalysis"](https://libapps-eu.s3.amazonaws.com/customers/404/images/Thesaurus_search_3.png)
4. Check the box in front of the term or any of the broader, narrower, or related terms to add them to your search query. If you wish to search for a term and all of its narrower terms simultaneously, you may check the respective box under "Explode". if you wish to search for articles, the primary focus of which is the term you are searching for, you may check the respective box under "Major Concept". When ready, click the "Add" button to add your selections to the database search box (i.e., the first box on the page).
![Screenshot highlighting the "Explode" and "Major Heading" options, and the "Add" button](https://libapps-eu.s3.amazonaws.com/customers/404/images/Thesaurus_search_4.png)
5. Notice the complicated combination of terms that has been added in the database search box. Repeat steps two to four, if you wish to add more terms to your query and click on "Search" to view the results.
![Screenshot highlighting the selected index terms](https://libapps-eu.s3.amazonaws.com/customers/404/images/Thesaurus_search_5.png)