| Term | Definition |
| Syntax | The component of grammar that governs the order of words |
| Morphology | A system of rules for combining the smallest unit of language into words |
| Bound Morpheme | must be attached |
| Free Morpheme | smallest functional unit |
| inflectional morpheme | type of bound, adds grammatical information, has wide range |
| derivational morpheme | type of bound, new word, limited range |
| open-class words | lexical categories, carry meaning, (n, v, adv) |
| closed-class words | functional categories, carry grammar, (aux, prep, compl det) |
| sentence | NP + VP |
| NP (or noun phrase) | (determiner + adj) + n |
| VP (or noun phrase) | v (+ NP) |
| prescriptive grammar | ideal, studied by grammarians |
| descriptive grammar | as it is, studied by linguists |
| Transitional Utterances | ex: vertical constructions, memorized constructions, word + jargon combos |
| Productive System | when children use the words they have in their vocabularies in different combinations |
| Telegraphic Speech | sentences missing parts of speech, ex: "I want to go park." |
| DSS | Developmental Sentence Score |
| IPSYN | Index of Productive Syntax |
| IPSYN | uses grammatical types instead of tokens, examines (n, v, q/neg, and sent struct). |
| DSS | 2 to 7 years, scores from # of mistakes |
| Wh- Questions | who, what, where, why, when, how |
| Response Strategies | enable children to respond to non-understood language, (ex: word order strat, order of mention, probable event) |
| coreference | multiple expressions in a sentence or document have the same referent. |