Phoneme Manner Types and Function and Content Words as Biomarkers for Different Types of Stutters in Speakers Who Continue to Stutter.
Peter Howell, Jason Ka-Hei Au, Liam Barrett
PMID 41560537WHAT IT FOUND
Whole-word repetitions occur almost exclusively on function words starting with vowels, while prolongations and part-word repetitions cluster on content words starting with specific consonants.
Grouping all stutter types together hides these distinct patterns.
Key findings
01Whole-word repetitions were the only stutter type more frequent on function words than content words, occurring almost entirely on vowel-initial words.
02On content words, prolongations were strongly associated with continuant sounds (like fricatives and liquids), whereas part-word repetitions and breaks were associated with obstruent sounds (like plosives).
03Breaks behaved like part-word repetitions rather than prolongations, contradicting the view that they are a form of perseveration.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The sample was heavily skewed towards males (18 boys, 4 girls), so findings may not generalise well to females. The study only included children who continued to stutter; it does not tell us if these patterns differ for children who will recover naturally. Speech samples varied significantly in length (67 to 584 syllables), which might affect the stability of the estimates for some participants.
Declared interests
The authors declare no conflicts of interest.
The easy way to misread this
Do not assume that whole-word repetitions are a mild form of stuttering that can be grouped with other disfluencies. This study shows they follow a completely different linguistic rule (vowel-initial function words) compared to prolongations and part-word repetitions (consonant-initial content words), suggesting they may serve a different function or have a different origin.
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