We expect that word knowledge accumulates gradually. This article draws on earlier approaches to assessing depth, but focuses on one dimension: richness of semantic knowledge. We present results from a study in which three distinct item types were developed at three levels of depth: knowledge of common usage patterns, knowledge of broad topical…

Passages used in the Illinois Goal Assessment Program (IGAP) reading test are intact pieces of literature, stories, and essays that match classroom reading assignments and typical student reading experiences. There are 15 testlets, each containing 5 items, associated with each passage. Each testlet requires students to demonstrate various levels…