Input Enhancement on Foreign Language Vocabulary Acquisition: Current Status and Future Prospect

This study reviewed the empirical research on the role of input enhancement on foreign language vocabulary acquisition published in core journals from 2009 to 2023, from which the current status and future trends of the studies were analyzed. The results manifested that (1) the number of input enhancement research demonstrated a trend of a spiral upward development; (2) the studies used different types of input enhancement as independent variable to explore their effects on the acquisition of target vocabulary; (3) the research materials applied in input enhancement were mostly in the reading mode, while lacked investigation in the listening mode. Therefore, future research could further examine the interactive and comparative effects of input enhancement on vocabulary acquisition as well as enhancing vocabulary in the materials with a variety of modes.