Event-Related Potentials in the Brain on Perception of Referentially Ambiguous Russian Pronounsстатья
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Аннотация:Event-related brain potentials (ERP) during perception of referentially ambiguous Russian pronouns were studied in conditions in which resolution of ambiguity was required for successful execution of the experimental task. Subjects were asked to identify the antecedent of the pronoun (the nominal group in the preceding sentence to which the pronoun relates) in a situation in which the antecedent of the pronoun could be only one nominal group (the control condition) and in the situation of referential conflict, where there were two such nominal groups (the experimental condition). Perception of referentially ambiguous pronouns, as compared with control pronouns, was accompanied by an Nref effect – a diffuse shift of ERP with latency 300–400 msec towards negative potentials, which has previously been observed in the Dutch and Chinese languages. In contrast to preceding studies, we found no P600 effect – an increase in late positivity, which is associated with additional analysis of the correctness of the sentence in conditions of referential ambiguity. Comparison of these data with results from previous studies provides evidence that the strategy of perceiving ambiguous expressions (assessment of correctness) may depend not only on the task, but also the presence/absence of anomalous trials in the experimental material.