Effects of Speech Stimuli and Dysarthria Severity on Intelligibility Scores and Listener Confidence Ratings for Speakers with Cerebral Palsy

Hustad, Katherine C.

doi:10.1159/000108337

Cited by 63 publications

(77 citation statements)

References 26 publications

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“…This contradicted findings reported in the literature that speech materials have differential effects on intelligibility of dysarthric speakers of different severity [25][26][27]. Although intelligibility ratings were carried out with different approaches in the above-mentioned studies (orthographic transcription) compared to our study, Yorkston and Beukelman pointed to a close approximation of the two measures [26].…”

Section: Discussioncontrasting

confidence: 99%

Speech Prosody Across Stimulus Types for Individuals with Parkinson’s Disease

K.-Y.

Schneider

Hoffmann

et al. 2015

Journal of Parkinson’s Disease

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Abstract.Background: Up to 89% of the individuals with Parkinson's disease (PD) experience speech problem over the course of the disease. Speech prosody and intelligibility are two of the most affected areas in hypokinetic dysarthria. However, assessment of these areas could potentially be problematic as speech prosody and intelligibility could be affected by the type of speech materials employed. Objective: To comparatively explore the effects of different types of speech stimulus on speech prosody and intelligibility in PD speakers. Methods: Speech prosody and intelligibility of two groups of individuals with varying degree of dysarthria resulting from PD was compared to that of a group of control speakers using sentence reading, passage reading and monologue. Acoustic analysis including measures on fundamental frequency (F0), intensity and speech rate was used to form a prosodic profile for each individual. Speech intelligibility was measured for the speakers with dysarthria using direct magnitude estimation. Results: Difference in F0 variability between the speakers with dysarthria and control speakers was only observed in sentence reading task. Difference in the average intensity level was observed for speakers with mild dysarthria to that of the control speakers. Additionally, there were stimulus effect on both intelligibility and prosodic profile. Conclusions: The prosodic profile of PD speakers was different from that of the control speakers in the more structured task, and lower intelligibility was found in less structured task. This highlighted the value of both structured and natural stimulus to evaluate speech production in PD speakers.

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Section: Discussioncontrasting

confidence: 99%

Speech Prosody Across Stimulus Types for Individuals with Parkinson’s Disease

K.-Y.

Schneider

Hoffmann

et al. 2015

Journal of Parkinson’s Disease

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“…Externally cued tasks, by their very nature, often heighten a person's awareness and attention to the task. In fact, environmental factors such as use of speech materials and the physical setting have been shown to increase typical speakers' attention to their speech production, enhancing performance (Goberman & Elmer, 2005;Hustad, 2007;Kent, Weismer, Kent, & Rosenbek, 1989). The same improvements have been found in individuals with PD (Keintz et al, 2007;Neely, 1956;Sarno, 1968;Weismer, 1984).…”

Section: Perceptual Ratings Of Naturalnessmentioning

confidence: 86%

Internally Versus Externally Cued Speech in Parkinson's Disease and Cerebellar Disease

Weir-Mayta

Spencer

Eadie

et al. 2017

Am J Speech Lang Pathol

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Purpose: The purpose of this study was to examine the effects of an internally versus externally cued speech task on perceived understandability and naturalness in speakers with Parkinson's disease (PD) and cerebellar disease (CD). Method: Sentences extracted from a covertly recorded conversation (internally cued) were compared to the same sentences read aloud (externally cued) by speakers with PD and a clinical comparison group of speakers with CD. Experienced listeners rated the speech samples using a visual analog scale for the perceptual dimensions of understandability and naturalness. Results: Results suggest that experienced listeners rated the speech of participants with PD as significantly more natural and more understandable during the reading condition. Participants with CD were also rated as significantly more understandable during the reading condition, but ratings of naturalness did not differ between conversation and reading. Conclusions: Speech tasks can have a pronounced impact on perceived speech patterns. For individuals with PD, both understandability and naturalness can improve during reading tasks versus conversational tasks. The speech benefits from reading may be attributed to several mechanisms, including possible improvement from an externally cued speech task. These findings have implications for speech task selection in evaluating individuals with dysarthria.This special issue contains selected papers from the March 2016 Conference on Motor Speech held in Newport Beach, CA. I t is well established that individuals with Parkinson's disease (PD) have difficulty performing skilled movement when forced to rely on internal cues versus responses guided by external cues or stimuli, such as a line on the floor to guide gait patterns (Gowen & Miall, 2007;Ketcham, Hodgson, Kennard, & Stelmach, 2003;Majsak, Kaminski, Gentile, & Flanagan, 1998;Morris, 2000;Sawamoto, Honda, Hanakawa, Fukuyama, & Shibasaki, 2002;Van Donkelaar et al., 2000). Most attribute this difficulty to dopaminergic deficits affecting the basal ganglia and fronto-striatal networks, which are involved in the preparation of internally generated movements (Cunnington, Iansek, Bradshaw, & Phillips, 1995;Lewis, Byblow, & Walt, 2000;Morris, 2000;Schenk, Baur, Steude, & Bötzel, 2003). As a result, individuals with PD become overly reliant on visual/auditory external stimuli to guide skilled movement (Romero, Van Gemmert, Adler, Bekkering, & Stelmach, 2003). Converging evidence suggests marked improvement in performance with external cueing for behaviors such as walking (Luessi, Mueller, Breimhorst, & Vogt, 2012;Mak, Yu, & Hui-Chan, 2013), writing (Oliveira, Gurd, Nixon, Marshall, & Passingham, 1997Teulings, Contreras-Vidal, Stelmach, & Adler, 1997), and driving (Scally et al., 2011; Stolwyk, Triggs, Charlton, Lansek, & Bradshaw, 2005). Internal Versus External Cueing and SpeechEvidence is also emerging regarding the influence of internal versus external cueing on speech production. The benefits of external cues have been demonstrated...

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“…Judgments of intelligibility of speech can be influenced by several factors (1) related to the listener (3)(4)(5)(6)(7)(8)(9)(10)(11) , the speaker (4,5,(7)(8)(9) or even the assessment instrument (1,(3)(4)(5)8,(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24) . With regard to assessment instruments, one such influencing factor is stimulus type (8) .…”

Section: Introductionmentioning

confidence: 99%

“…With regard to assessment instruments, one such influencing factor is stimulus type (8) . Many studies have identified the effect of using different speech stimuli on intelligibility scores (4,5,8,(12)(13)(14)(15)17,18,(23)(24)(25)(26) . Some of these studies have shown that the greater the number of semantic cues available to listeners, the higher the intelligibility scores of speakers (4,8,17,18,24) .…”

Section: Introductionmentioning

confidence: 99%

Preditividade das sentenças do protocolo de avaliação da inteligibilidade de fala nas disartrias

Alexandre

Barreto

Ortiz

2011

J. Soc. Bras. Fonoaudiol.

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OBJETIVO: Analisar a preditividade das sentenças utilizadas no protocolo de avaliação da inteligibilidade da fala nas disartrias. MÉTODOS: Foi realizado um estudo transversal com 120 voluntários divididos, aleatoriamente, em quatro grupos de 30 indivíduos. A partir da lista de 25 frases do protocolo, foram elaboradas quatro versões de listas. Em cada uma delas, uma palavra-alvo diferente foi omitida das sentenças. Cada grupo de participantes completou uma versão da lista preenchendo graficamente as lacunas com a primeira palavra que lhes viesse à mente, de modo que cada sentença ficasse coerente. Foram realizadas análises estatísticas para classificar as frases quanto a sua preditividade, comparar a preditividade das palavras em cada sentença e comparar as versões da lista. RESULTADOS: Três sentenças apresentaram alta preditividade; sete, média preditividade; e 15, baixa preditividade. Foram encontradas diferenças de preditividade entre as palavras-alvo em 84% das frases (p<;0,0054). Comparando as versões da lista, constatou-se que a versão 1 diferiu das demais (p<;0,002), mostrando-se menos previsível. CONCLUSÃO: No protocolo de avaliação da inteligibilidade da fala empregado neste estudo há predomínio de sentenças de baixa preditividade, sugerindo que estas podem ser empregadas de maneira confiável na avaliação da inteligibilidade. A análise da inteligibilidade em sentenças por palavras-alvo deve ser usada clinicamente, especialmente quando se conhece a preditividade das sentenças.

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Effects of Speech Stimuli and Dysarthria Severity on Intelligibility Scores and Listener Confidence Ratings for Speakers with Cerebral Palsy

Cited by 63 publications

References 26 publications

Speech Prosody Across Stimulus Types for Individuals with Parkinson’s Disease

Speech Prosody Across Stimulus Types for Individuals with Parkinson’s Disease

Internally Versus Externally Cued Speech in Parkinson's Disease and Cerebellar Disease

Preditividade das sentenças do protocolo de avaliação da inteligibilidade de fala nas disartrias

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