Describes a module used to teach ESL students to distinguish phrases from clauses and sentences from nonsentences or fragments, thus enabling them to edit the errors of punctuation out of their writing. A chart of four grammatical units in a hierarchy (single words, groups of words, clauses, and sentences) is included. (Author/PJM)

A study investigated whether children and adolescents use commas and the principle of Late Closure to guide sentence parsing decisions as adults do in processing syntactically ambiguous sentences. The study consisted of three experiments, conducted similarly but with different subject groups: 24 university students; 24 fourth-graders; and 19…