This is the dataset of a lexical decision task performed in English as L2 by Dutch L1 participants. The dataset contains raw RTs and accuracy scores for the stimuli and participant information. The 800 word stimuli in the experiment are taken from the Ghent Eyetracking COrpus (Cop et al., 2017). A detailed method section on the task can be found in the supplementary material of Dirix & Duyck (201...