Details findings indicating that most early linguistic competence is item based. Maintains that language development proceeds without evidence of system-wide syntactic categories, schemas, or parameters. Suggests that findings are not easily explained by the development of children's skills of linguistic performance, pragmatics, or other external…

Examined parental speech data demonstrating that linguistic input to children does not contain sufficient information to support unaided learning of the pronoun "one." Examined 18-month-olds' interpretation of sentences with a "one" substitution. Found that 18-month-olds have command of the syntax of "one." Because…