The effect of the degree of acoustical distortion on lexical access by younger adults
Keywords:Information theory, Speed, Acoustical informations, Degree of distortions, Encoding, Filtering, Linguistic informations, Low-pass, Priming effects, Response times, Semantic contexts
AbstractA study was conducted to investigate how the speed of processing a sentence-final target word is influenced by varying the degree of acoustic distortion applied to three different types of sentence contexts, including semantically congruent, semantically incongruent, and semantically neutral. The results of the study showed that acoustically distorting the semantic context using low-pass filtering disrupts the encoding of linguistic information as evidenced by changes in the speed of lexical decision for a following target word that was spoken without distortion. The extended response times arising from the low-pass filtering contributed to a smaller facilitation priming effect, which varied with the degree of distortion that was applied. The study concluded that the amount and/or quality of available acoustical information seems to be more important to lexical access and lexical decision operations that is the type of distortion.
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