This article presents a review of research that has investigated ways of measuring implicit and explicit knowledge of a second language (L2), focusing on grammar. It begins by defining implicit and explicit knowledge in terms of a distinguishing set of criteria. Two ways of investigating implicit knowledge are discussed -- through experimental…

The purpose of test directions is to familiarize examinees with a test so that they respond to items in the manner intended. However, changes in educational measurement as well as the U.S. student population present new challenges to test directions and increase the impact that differential familiarity could have on the validity of test score…

This article provides in-depth information regarding the most commonly used instruments for the screening or diagnosis of autistic spectrum disorders. Reliability, validity, format, and target population are presented to help clinicians select appropriate diagnostic measures. Future directions in the development of new instruments are discussed.…

Most seasoned test developers recognize the importance of thoughtful decision making when constructing a test. Unfortunately, many classroom achievement tests are created by novice test developed who have not received sufficient instruction in item writing (G. Gulliksen, 1986; R. J. Stiggins, 1991). The result is often a test that is poorly…

A meta-analysis was conducted of 107 classroom and laboratory studies concerning the effects of expecting a recall, recognition, essay, multiple-choice, or true-false test on students' subsequent achievement. Laboratory studies did not generalize well to classrooms. In classroom studies, subjects performed better when they knew which test type to…