Cumulative exposure to fast speech conditions duration of content words in English

Abstract This paper tests the idea that the speech rate with which surrounding words are spoken affects the mental representation of words and conditions production of words. This possibility is operationalized by measuring a word's ratio of occurrence in speaker-relative fast speech. Other variables shown in the literature to influence speech rate are controlled for in a 10,000-iteration bootstrapping procedure of a mixed-effect linear regression model. The results of the analysis of 39,397 tokens of content words from 1,232 word types in English display a significant effect for a word's ratio of conditioning in speaker-relative fast speech, although the effect size is small or very small. Other variables shown in the literature to condition speech rate also significantly condition speech rate here. This paper suggests that in addition to other aspects of the context of use of words, contextual speech rate also influences the mental representation of words.