Differential skill functioning (DSF) exists when examinees from different groups have different probabilities of successful performance in a certain subskill underlying the measured construct, given that they have the same ability on the overall construct. Using a DSF approach, this study examined the differences between two native language…

Newer statistical procedures are typically introduced to help address the limitations of those already in practice or to deal with emerging research needs. Quantile regression (QR) is introduced in this paper as a relatively new methodology, which is intended to overcome some of the limitations of least squares mean regression (LMR). QR is more…

Presents a case study of the effects of the Test of English as a Foreign Language (TOEFL) on two teachers in the same institution. The study investigates claims that the TOEFL exerts an undesirable influence on language teaching. Findings reveal that influences on what happens in class are more complex than unexamined beliefs about washback allow.…

Tests the hypothesis that there is no monotonic relationship between increasing competence in different linguistic domains and growth in second-language proficiency. The article concludes with an introduction to some assessment models that can accommodate discontinuous growth patterns. These models can describe and model a student's qualitative…