Original names: APA PsycInfo Classification Categories and Codes and APA PsycTests Classification System

PsycInfo and PsycTests are two classification systems within the field of Psychology, developed by the American Psycological Association (APA) to describe the content of the APA PsycInfo database.

The two schemes have a total of 188 concepts with PsycInfo consisting of 157 concepts and PsycTests of 31. Both PsycInfo and PsycTests associate a 4-digit code to each concept, allowing the user to unambiguously locate those concept within the three-layer hierarchical structure. %These codes drive also the 3-level structure of the taxonomy. The first two digits in each four-digit number identifies the root or discipline. For example, Health & Mental Health Treatment & Prevention 3300. The third digit in each four-digit number indicates the focus area, such as Rehabilitation 3380. The fourth digit in each four-digit number identifies the topic, like Drug & Alcohol Rehabilitation 3383.

Although, PsycInfo and PsycTests have been developed following the same principles, only PsycInfo is a taxonomy. PsycTests is rather a thesaurus as all its codes identify a root term pattern XX00. For instance, Anxiety and Depression 5100, Aptitude and Achievement 5200.

Both classification schemes can be browsed either from the main website or their printer-friendly version on PDF. APA owns all copyright rights of both PsycInfo and PsycTests Classification Systems.