Two types of classification error are possible in competency tests: erroneous classification of an individual as a "master" of the subject (Type II error), and erroneous classification of a master as a "nonmaster" of the subject (Type I). If steps are taken to minimize Type II errors, an artificially high number of true masters…

Cross-cultural validity studies for psychological instruments may result in overestimation of structure invariance due to some items being scored on more than one scale. This problem, called the common-item effect, is investigated with some data from the literature. (JKS)

Ten groups (2-5 members each) of tenth-grade Israeli English-as-a-Second-Language students took first a group quiz and then individual quizzes on the same material. Comparison of the results showed that, especially for weaker students, group work and group grades offered some advantages over individual work and assessment. (CNP)

This study compares a self-assessment instrument and achievement test containing the same questions and administered at different levels of proficiency in order to investigate the reliability of second language self-assessment for student placement, diagnostic purposes, and achievement testing. Subjects were English as a Foreign Language students…