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How well does DDK task performance predict fluent speech articulation?
Umeå University, Faculty of Medicine, Department of Clinical Sciences, Speech and Language Therapy.ORCID iD: 0000-0003-3373-0934
Umeå University, Faculty of Medicine, Department of Radiation Sciences.
Göteborgs universitet.ORCID iD: 0000-0003-3461-7618
2018 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

The oral diadokochinesia (DDK) task is an established tool for assessing speech motor control that has been used across a range of conditions. The predominant outcome measure reported after the patient have performed the task is the maximum syllable rate achieved by the patient. More recent reports have also highlighted stability in pace of the sequence as quantifications that may be indicative of speech impairment. While the DDK task affords quick and easy administration, concerns have been raised regarding the strength of association between DDK task performance and patients’s articulation in fluent speech. It may not be assumed that a reduced DDK rate or rate stability will cause fluent speech also to be perceived as slowed or dysrhythmic. And, patients may well improve their syllable rate at the expense of articulatory quality, which is currently not easily captured in an objective outcome measure.

We report here on an effort to assess to what degree information from an expanded quantification of DDK sequences may be used identify patients with dysarthria and to model clinical assessments of fluent speech. Acoustic quantifications of the consonant and consonant-vowel relationship are combined with previously used measures, and applied to manually processed DDK sequences produced by patients with Parkinson’s disease and normal control speakers. We observe how well these quantifications may form the basis for accurate identification of patients among normal controls, and predict the outcome of blinded and randomized clinical assessments of patients’ production of fluent speech.Rapid repetition of CV syllables (oral diadochokinesis, DDK) puts pressure on the speech motor system in order to afford detection of a deteriorating articulatory ability.

This study assessed

  1.  how well objective quantifications of DDK

    sequences can be used to identify PD speakers

    among age matched controls (NC), and

  2. how well a reduced articulatory ability in PD

    speakers may be predicted using quantifications of DDK sequences performed in the same recording session.

The comprehensive DDK sequence quantification achieved a 93% classification accuracy for speaker group and a 79% accuracy for reduced fluent speech articulatory quality. 

Place, publisher, year, edition, pages
2018.
National Category
Other Medical Sciences not elsewhere specified
Research subject
Linguistics
Identifiers
URN: urn:nbn:se:umu:diva-144767OAI: oai:DiVA.org:umu-144767DiVA, id: diva2:1182593
Conference
Nineteenth Biennial Conference on Motor Speech: Motor Speech Disorders & Speech Motor Control, Feb 22 – 25, 2018, Savannah, Georgia
Available from: 2018-02-14 Created: 2018-02-14 Last updated: 2018-06-09Bibliographically approved

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Karlsson, FredrikHartelius, Lena

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CiteExportLink to record
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Citation style
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