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It is noteworthy that the presence of muscle tension associated with non hesitative prolongations was a characteristic occurring only in the research group, therefore suggesting that this is a typical manifestation of stuttering.
Regarding the duration of non hesitative prolongations, adults who stutter did not show significant differences compared with adults who do not stutter.
The number of non hesitative prolongations was higher in adults who stutter, both in content words and function words.
Next, we present the analysis of hesitative prolongations.
There was no difference of hesitative prolongations in the intergroup analysis concerning the positions of prolongations in words and sentences.
We found no different regarding muscle tension and the duration in hesitative prolongations expressed by adults who do and do not stutter, as was expected, considering that these prolongations are characterized by not being accompanied by tension and by being short [20].
Regarding the distribution of hesitative prolongations in content and functional words, the groups had similar results.
The analysis of non hesitative prolongations showed that, quantitatively, adults who stutter showed higher occurrence in relation to fluent adults, both in content and functional words.
Regarding hesitative prolongations, it is concluded that they were more common in the speech of fluent adults in relation to the total of disfluencies.