Higher reading spans mitigate context effects on lexical processing by low-proficiency L2 learners: a self-paced reading study

This study examines context effects on lexical processing by low-proficiency Japanese learners of English during sentence comprehension, and the role of individual differences in verbal working memory (WM). Thirty Japanese learners of English as a second language (L2) and 27 speakers of English as a first language (L1) were recruited for a self-paced reading task with high and low context sentences to assess lexical processing abilities, and a reading span task to measure WM capacities. Bayesian modeling indicated that, at the group level, L2 learners had slower lexical processing times for low context sentences compared to high context ones, especially in the spillover region, while L1 speakers showed no difference. At the individual level, higher WM capacities among L2 learners appeared to mitigate these context effects, supporting the interactive-compensatory model (Stanovich in Read Res Q, 10.2307/747348, 1980; Remedial Spec Educ 5(3):11–19, 10.1177/074193258400500306, 1984). The findings highlight context effects on L2 lexical processing and the crucial role of WM in managing these effects among L2 learners.