This article reviews the origins and use of the terms quasi-experiment and natural experiment. It demonstrates how the terms conflate whether variation in the independent variable of interest falls short of random with whether researchers find, rather than intervene to create, that variation. Using the lens of assignment--the process driving…

This edited collection provides a state-of-the art overview of research on willingness to communicate (WTC) in a second and foreign language. In particular, it includes innovative studies seeking to demonstrate the ways in which WTC can be examined within the framework of complex dynamic systems, how the construct is related to self-assessment,…

The MacArthur Communicative Development Inventory (a parent-report measure of vocabulary and syntax) was administered to 103 children (mean age 103 months) who participated in a study of temporal resolution as infants. Children who had performed above the median on the temporal resolution task demonstrated better later language development than…

This study of language performance tracked 34 poor children from kindergarten through second grade. The best kindergarten predictor for eventual diagnosis with a specific language impairment was a combination of the score on the Oral Vocabulary subtest of the Test of Oral Language Development and the score on a combination of experimental tasks.…

This study of 121 10th-grade students investigated the criterion-related validity of 2 potential curriculum-based measurements, reading from text and identifying vocabulary meaning, for predicting student performance on content-area study tasks. Correlational and multiple regression techniques found the vocabulary measure to be the stronger…