Derivational morphology (DM) and how it can be assessed have been investigated relatively rarely in language learning and testing research. The goal of this study is to add to the understanding of the nature of DM knowledge, exploring whether and how it is separable from vocabulary breadth. Eight L2 (second or foreign language) English DM…

The present article argues for a conceptual distinction between corrective feedback and mediation that emphasizes the status of the latter not as an instructional practice but as a defining feature of human psychology (Vygotsky, 1987) that has direct implications for how instruction might be approached. Specifically, Sociocultural Theory (SCT)…

Knowledge of derivational morphology is considered an important aspect of vocabulary knowledge both in L1 (mother tongue) and L2 (second or foreign language) English language learning. However, it is still not clear whether different derivational affixes vary in their (learning) difficulty. The present study examines whether Bauer and Nation's…