Eye movement parameters in reading sentences with syntactic ambiguities in Russian

We studied eye movement parameters in reading syntactically ambiguous sentences with the feminine variant of relative clause in Russian. A priori difficulty in analyzing the structure of the sentence leads to the increased time of its reading, compared with the time of reading control (unambiguous) sentences. The time of reading increases due to higher frequencies of regressive saccades made by the subjects for rereading the ambiguous fragments of the sentence. This fact, in turn, leads to an increased number of fixations and their longer duration. The total reading time for the particular words that make up the ambiguous fragment depended on disambiguation result (the type of closure). When the subjects attached the subordinate clause to the first noun of the noun group (early closure), the time of reading this noun increased, compared to the reading time required for the second noun. When the subjects chose the second noun (late closure), the time of reading either of the two did not differ. Our results indicate that the increased time of reading the first noun of the noun group attached to the subordinate clause depends on the prevalence of early closure in the Russian language.