CYCLE (Curtiss Yamada Comprehensive Language Evaluation) is a tool to evaluate language ability. It provides information about syntax, morphology, and semantics. CYCLE Tests cover structures and features that emerge during the active language development years. The test, informed by linguistic theory, includes structures that comprise a major part of the grammatical core of English. CYCLE Tests are designed to test language as distinct from cognitive and intellectual ability. The Receptive Battery evaluates comprehension and the elicited Expressive Battery evaluates production of language.