Abstract
This study investigated the hypothesis by Lieberman (1963) that speakers adjust the intelligibility information in words in a sentence in inverse relation to the semantic and grammatical information content of the sentence. The experiments examined the relationship between context and intelligibility for single words produced in word lists, in ordinary sentences and in anomalous sentences. in the first experiment performance was found to be at the same level on words from sentences, anomalous sentences, and word lists. in the second and third experiments the effect of text format on a difference in intelligibility between sentence-produced and list-produced words was examined. It was shown that the intelligibility of words from list context was superior where the sentence and list context materials to be produced by the speaker were separated for the production task. However, where the sentence and list context material were interleaved in the production task, this effect was removed. These results demonstrate that the intelligibility information of a word in a sentence can be adjusted by the speaker on the basis of information about the structure of the text, as well as in response to the syntactic and grammatical information in the sentence.
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