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How Well Does Diadochokinetic Task Performance Predict Articulatory Imprecision?: Differentiating Individuals with Parkinson's Disease from Control Subjects
Umeå University, Faculty of Medicine, Department of Clinical Sciences, Speech and Language Therapy.ORCID iD: 0000-0003-3373-0934
Institute of Neuroscience and Physiology, Department of Health and Rehabilitation, University of Gothenburg, Gothenburg, Sweden.ORCID iD: 0000-0003-3461-7618
2019 (English)In: Folia Phoniatrica et Logopaedica, ISSN 1021-7762, E-ISSN 1421-9972Article in journal (Refereed) Epub ahead of print
Abstract [en]

OBJECTIVE: To investigate whether syllables produced in an oral diadochokinetic (DDK) task may be quantified so that persons with Parkinson's disease (PD) perceived to have reduced articulatory precision when reading may be correctly identified using that quantification.

PATIENTS AND METHODS: Syllable sequences from 38 speakers with PD and 38 gender- and age-matched control speakers (normal controls [NC]) were quantified acoustically and evaluated in terms of (1) the speakers' ability to accurately predict speaker group membership (PD or NC) and (2) their ability to predict reduced/non-reduced articulatory precision.

RESULTS: A balanced accuracy of 80-93% in predicting speaker group membership was achieved. The best measures were related to the proportion of a syllable made up of a vowel, amplitude slope and syllable-to-syllable variation in duration and amplitude. The best material was that based on /ka/. Reduced articulatory precision was accurately predicted from DDK measures in 89% of the samples. Release-transient prominence and voicing during the onset of plosives were particularly strong predictors.

CONCLUSIONS: DDK sequences can predict articulatory imprecision as observed in another speech task. The linking of performance across speech tasks probably requires measures of stability in syllable durations and amplitudes, as well as measures of subsyllabic acoustic features.

Place, publisher, year, edition, pages
S. Karger, 2019.
Keywords [en]
Diadochokinetic task, Dysarthria, Parkinson’s disease
National Category
Other Medical Sciences not elsewhere specified
Research subject
Linguistics
Identifiers
URN: urn:nbn:se:umu:diva-159341DOI: 10.1159/000498851PubMedID: 31117108OAI: oai:DiVA.org:umu-159341DiVA, id: diva2:1318155
Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-05-28

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Karlsson, Fredrik

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