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Modality-specific effects in bilingual language perception

ABSTRACT

Language switching typically leads to language switch costs. Previous studies demonstrated that production-based language switching often results in reduced costs when the languages are assigned to distinct modalities (i.e. bimodal language switching) compared to switching within a modality (i.e. unimodal switching). In Experiment 1–3, we compared unimodal to bimodal switching in language perception. In Experiment 4, unimodal switching was compared to bivocal switching (i.e. languages were assigned to different voices). Experiment 1–3 revealed significantly higher switch costs for bimodal than for unimodal switching, indicating fundamental differences to language production studies. While bimodal switching leads to no (additional) costs but – under specific conditions – even to advantage in production, it increases switch costs in language perception. Moreover, Experiment 4 indicates that this is more a modality-specific rather than a general perception-based effect. Different voices instead of different modalities evoked no similar increase in switch costs.