Research has shown that general vocabulary knowledge (e.g., Milton & Treffers-Daller, 2013), academic vocabulary knowledge (e.g., Townsend et al., 2012) and general intelligence (e.g., Laidra et al., 2007) are good predictors of academic achievement. While the effect of these factors has mostly been examined separately, Townsend et al. (2012)…

This study investigates word difficulty and learning among learners of English as a foreign language (EFL) in Saudi Arabia. Difficulty factors examined in the study include repetition of words in learners' EFL textbooks, word length and parts of speech, and adds a further consideration which is underexplored in the literature; word translation…