The present study investigated the effects of word-recognition training on the word-recognition processing of learners of English as a foreign language (EFL). Providing 7-week word-recognition training, the study examined whether such training improves EFL learners' word-recognition performance. The main aspects of this study concerned word frequency and working-memory capacity in automatization of word recognition. Analysis of variance and correlational analyses revealed qualitative differences in the improvement of EFL word-recognition performance with respect to word frequency. The improvement in the processing of high-frequency words was associated with simple speedup; conversely, the processing of low-frequency words was associated with automatization. Results also showed that working-memory capacity might not play a noticeable role in improving word-recognition speed or efficiency.