The interaction of the wrap-up effect and uncertainty factors in speech processing


The click-detection paradigm was employed to probe the load exerted by the parser within simple Spanish sentences. In Experiment 1, three positions at the beginning of clauses were established and results suggest that Ss are better prepared the deeper into a sentence the click is. Experiment 2 ran an ERP experiment to determine whether these RTs were the result of the “uncertainty” Ss may have felt regarding the click position, the idea being that the amplitude of the P300 would correlate with the click positions. In Experiment 3, click positions were moved to the end of clauses to establish if the end of a sentence results in a specific strain on working memory. RTs show that Ss are slower in the first position but the measures even out after that, with the possibility that Ss may have attempted to “wrap it up” in both the second and the third positions.

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