Trial reportInternational journal of speech-language pathology2019
Vocal function exercises for normal voice: With and without semi-occlusion.
Trial report in International journal of speech-language pathology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
5 citing papers in PubMed, 21 citations in OpenAlex.
- Vocal Function Exercises With and Without Maximally Sustained Phonation: A Randomized Controlled Trial of Individuals With Normal Voice.Journal of voice : official journal of the Voice Foundation · 2025Trial
- Effects of Sustained Semi-Occluded Vocal Tract Exercises in Non-Disordered Populations.Journal of voice : official journal of the Voice Foundation · 2025Article
- Efficacy of a Tesla Valve Straw in a Semi-Occluded Vocal Tract Exercise in a Normal-Voiced Population.Journal of voice : official journal of the Voice Foundation · 2025Article
- Active Ingredients of Voice Therapy for Muscle Tension Voice Disorders: A Retrospective Data Audit.Journal of clinical medicine · 2021Article
- Does Voice Therapy Improve Vocal Outcomes in Vocal Fold Atrophy?The Annals of otology, rhinology, and laryngology · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 1 institution in 1 country.
Funding
Abstract
purposeThis study examined the effect of varying degrees of vocal tract (VT) occlusion used during Vocal Function Exercises (VFEs) on attainment of maximum phonation time (MPT) goals in normal voice. Greater VT occlusion was expected to result in increased MPT. The overarching goal was to determine whether the semi-occluded vocal tract (SOVT) posture used during VFEs could be modified while preserving efficacy.
methodTwenty-six females ages 18-30 participated in this pre-post longitudinal group study. Participants were randomly assigned to three experimental groups and completed a six-week VFE protocol. The first group performed exercises using the prescribed SOVT posture; the second group used the vowel /o/; group three used the vowel /a/. The primary outcome measure was MPT as performed on the exercise tasks using the assigned vocal tract posture.
resultMPT significantly improved in the prescribed SOVT group, but did not significantly improve in the modified /o/ and /a/ groups.
conclusionThe SOVT posture used during VFEs is modifiable to a small extent without significantly undermining efficacy. Changes in MPT are less robust with reduced VT occlusion. Research in a clinical population is warranted.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.