Purpose: There is a shortage of available methods to accurately inform the developmental status of children whose cultural and linguistic backgrounds vary from the mainstream. The purpose of this review article was to describe different approaches used to support the accurate characterization of speech, language, and functional communication in…

How to compute and report subscores for a test that was originally designed for reporting scores on a unidimensional scale has been a topic of interest in recent years. In the research reported here, we describe an application of multidimensional item response theory to identify a subscore structure in a test designed for reporting results using a…

Analysis of 12 Scottish and 12 American 3- to 6-year-olds interacting with adults indicated that, because Scottish adults use the present perfect tense more frequently in their speech to children than American adults do, Scottish children use the tense in their speech long before American children do. (Author/CB)