This paper presents the author's response to Xiaoming Xi's article titled "How do we go about investigating test fairness?" In this response, the author focuses on test fairness and Toulmin's model of argument structure, Xi's proposal, and the challenges the proposal brings. Xi proposes an approach to investigating test fairness to guide…

Provides an introduction to structural equation modelling (SEM) for language research, including: general objectives of SEM applications relevant to language assessment; methodology and statistical assumptions about data that must be met; commonly-used SEM steps and concepts; application matters, with sample models; and recent critical discussions…

Questions the plausibility of the unitary competence hypothesis, which assumes a universal structure of second language competence. New evidence, showing divergent structures in language ability subgroups and different influences of teaching styles on different language components, better supports a multidimensional model of foreign language…