A method of quantifying language using the average number of morphemes in an utterance. Many professionals use the mean length of utterance as a predictor of the rate of language acquisition.

Vocabulary.

Something humans use as they are prewired to learn the language. The language acquisition device is a part of the Innatist Theory.

The babble of a young child that contains the intonation of adult speech.

A means of expression using both vocal cues (intonation and grunts) and nonverbal cues (giving, pointing, or showing).

Could be responsible for our ability to process sentences. The Human Sentence Processing Mechanism is believed to be genetically predetermined.

A single word that represents an entire phrase.

The part of the language that is made up of phonology, morphology, and syntax.

Any extended conversation more than a single utterance. Discourse can include both monologues and dialogues.

An aspect of language that most people refer to as semantics.