This article reports the results of two studies on the vocabulary growth of advanced learners of English as a foreign language in an English-medium degree programme. Growth in learners' written receptive and productive vocabularies was investigated in one cross-sectional and one longitudinal study over three years. The effect of word frequency on…

Vocabulary is an essential component of language. It is central to reading ability, writing ability and listening ability, and the most important aspect of second-language (L2) knowledge for academic achievement. The aim of this paper is to investigate quantitatively some of the factors that make some L2 words more difficult to learn and retain…