We examined the cognitive processes underlying the comprehension of reduced word pronunciation variants in natives and advanced learners of French. In a passive listening visual world task, participants heard sentences containing either a reduced or a full form and saw pictures representing the target word, a phonological competitor and two neutral distractors. After each sentence they saw a picture and had to decide whether it matched the content of that sentence. Eye movements and EEG were recorded simultaneously. Because the two recordings offer complementary information about cognitive processes, we developed methods for analysing the signals in combination. We found a stronger effect of reduction on phonetic processing and semantic integration in learners than in natives, but the effects are different from the N100/N400 and P600 effects found in previous research. Time-locking EEG signals on fixation moments in the eye movements offers a window onto the time course of semantic integration.