The CASL provides a precise picture of problems with language processing skills (comprehension, expression, and retrieval) in four language structure categories: Lexical/Semantic, Syntactic, Supralinguistic, and Pragmatic. Fifteen highly reliable separate subtests can each be used as a stand-alone test. Core tests measure the most representative aspects of each language category while supplementary tests provide additional diagnostic information.

The CASL battery is ideal for measuring delayed language, oral language disorders, dyslexia, and aphasia. Only a verbal or nonverbal (pointing) response is required. Reading or writing ability is not needed to respond to test items.