* It's a typo: Could you be thinking of a different test? Perhaps you could provide more context, such as the area of assessment (e.g., intelligence, personality, neuropsychological) or the institution that administered the test.
* It's a specific, less common test: Some tests are used only within specific research settings or clinics.
* It's an internal abbreviation: The acronym might be used internally by a particular organization or research group.
To understand the meaning of a test score, you need to know the name of the test itself. Providing more information will allow for a more accurate answer.