Exploring the cognitive mechanism of irrelevant speech effect in Chinese reading: Evidence from eye movements

Abstract

the (ISE). key to for namely, the Phonological-Interference Hypothesis and the Semantic-Interference Hypothesis. have investigated the effect in Chinese the mechanisms for the also unclear. Accordingly, with the present research we examined the irrelevant speech effect in Chinese using eye movement measures. simple sentences as stimuli, there was also no significant difference between the silent and intelligible background speech condition. However, in Experiment 2, which used more complex sentences, normal reading was disrupted in the intelligible background speech condition compared to silence, revealing an ISE for these more difficult sentences. Compared with the silent condition, the intelligible background speech produced longer reading times and average fixation duration, more numbers of fixations and regressions, longer regression path reading time and longer total fixation times. Finally, Experiment 3 also produced evidence for an ISE, with longer total reading times, more fixations, and longer regression path reading times and total reading times in the intelligible background speech condition compared with silence. To sum up, the results of the current three experiments suggest that: (1) unintelligible speech does not disrupt normal reading significantly, contrary to the Phonological-Interference Hypothesis; (2) intelligible background speech can disrupt the reading of complex (but not simpler) sentences and also paragraph reading, supporting the Semantic-Interference Hypothesis. Such findings suggest that irrelevant speech might disrupt later stages of lexical processing and semantic integration in reading, and that this effect is modulated by the difficulty of the reading task.