The Experts below are selected from a list of 123 Experts worldwide ranked by ideXlab platform
Frank Domahs - One of the best experts on this subject based on the ideXlab platform.
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functional lateralization of lexical stress representation a systematic review of patient data
Frontiers in Psychology, 2014Co-Authors: Katja Hauser, Frank DomahsAbstract:According to the functional lateralization hypothesis (FLH) the lateralization of speech prosody depends both on its function (linguistic = left, emotional = right) and on the size of the units it operates on (small = left, large = right). In consequence, according to the FLH, lexical stress should be processed by the left (language-dominant) hemisphere, given its linguistic function and small unit size.We performed an exhaustive search for case studies of patients with acquired Dysprosody due to unilateral brain damage. In contrast to previous reviews we only regarded Dysprosody at the lexical level (excluding phrasal stress). Moreover, we focused on the representational stage of lexical stress processing, excluding more peripheral perceptual or motor deficits.Applying these criteria, we included nine studies reporting on eleven patients. All of these patients showed representational deficits in word stress processing following a lesion in their language-dominant hemisphere. In nine out of eleven patients, it was the left hemisphere which was affected. This is a much more consistent pattern as found in previous reviews, in which less rigorous inclusion criteria may have blurred the pattern of results.We conclude that the representation of lexical stress crucially relies on the functioning of the language-dominant (mostly left) hemisphere.
Kirrie J Ballard - One of the best experts on this subject based on the ideXlab platform.
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orthographically sensitive treatment for Dysprosody in children with childhood apraxia of speech using rest intervention
Developmental Neurorehabilitation, 2014Co-Authors: Patricia Mccabe, Kirrie J Ballard, Anita G Macdonalddsilva, Lauren J Van Rees, Joanne ArciuliAbstract:AbstractObjective: Impaired prosody is a core diagnostic feature of Childhood Apraxia of Speech (CAS) but there is limited evidence of effective prosodic intervention. This study reports the efficacy of the ReST intervention used in conjunction with bisyllabic pseudo word stimuli containing orthographic cues that are strongly associated with either strong-weak or weak-strong patterns of lexical stress. Methods: Using a single case AB design with one follow-up and replication, four children with CAS received treatment of four one-hour sessions per week for three weeks. Sessions contained 100 randomized trials of pseudo word treatment stimuli. Baseline measures were taken of treated and untreated behaviors; retention was measured at one day and four weeks post-treatment. Results: Children’s production of lexical stress improved from pre to post-treatment. Treatment effects and maintenance varied among participants. Conclusions: This study provides support for the treatment of prosodic deficits in CAS.
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an acoustic measure of lexical stress differentiates aphasia and aphasia plus apraxia of speech after stroke
Aphasiology, 2014Co-Authors: Marianne K Vergis, Kirrie J Ballard, Joseph R Duffy, Malcolm R Mcneil, Dominique I Scholl, Claire LayfieldAbstract:Background: Apraxia of Speech (AOS) is partly characterised by impaired production of prosody in words and sentences. Identification of Dysprosody is based on perceptual judgements of clinicians, with limited literature on potential quantitative objective measures.Aims: This study investigated whether an acoustic measure quantifying degree of lexical stress contrastiveness in three syllable words, produced in isolation and in a carrier sentence, differentiated individuals with AOS with/without aphasia (AOS), aphasia only (APH), and healthy controls (CTL).Methods & Procedures: Eight individuals with aphasia, nine with AOS plus aphasia and 8 age-matched control participants named pictures of strong–weak and weak–strong polysyllabic words in isolation and in a declarative carrier sentence. Pairwise Variability Indices (PVI) were used to measure the normalised relative vowel duration and peak intensity over the first two syllables of the polysyllabic words.Outcomes & Results: Individuals with aphasia performe...
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a treatment for Dysprosody in childhood apraxia of speech
Journal of Speech Language and Hearing Research, 2010Co-Authors: Kirrie J Ballard, Donald A Robin, Patricia Mccabe, Jeannie McdonaldAbstract:Purpose Dysprosody is considered a core feature of childhood apraxia of speech (CAS), especially impaired production of lexical stress. Few studies have tested the effects of intervention for dyspr...
Patricia Mccabe - One of the best experts on this subject based on the ideXlab platform.
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orthographically sensitive treatment for Dysprosody in children with childhood apraxia of speech using rest intervention
Developmental Neurorehabilitation, 2014Co-Authors: Patricia Mccabe, Kirrie J Ballard, Anita G Macdonalddsilva, Lauren J Van Rees, Joanne ArciuliAbstract:AbstractObjective: Impaired prosody is a core diagnostic feature of Childhood Apraxia of Speech (CAS) but there is limited evidence of effective prosodic intervention. This study reports the efficacy of the ReST intervention used in conjunction with bisyllabic pseudo word stimuli containing orthographic cues that are strongly associated with either strong-weak or weak-strong patterns of lexical stress. Methods: Using a single case AB design with one follow-up and replication, four children with CAS received treatment of four one-hour sessions per week for three weeks. Sessions contained 100 randomized trials of pseudo word treatment stimuli. Baseline measures were taken of treated and untreated behaviors; retention was measured at one day and four weeks post-treatment. Results: Children’s production of lexical stress improved from pre to post-treatment. Treatment effects and maintenance varied among participants. Conclusions: This study provides support for the treatment of prosodic deficits in CAS.
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a treatment for Dysprosody in childhood apraxia of speech
Journal of Speech Language and Hearing Research, 2010Co-Authors: Kirrie J Ballard, Donald A Robin, Patricia Mccabe, Jeannie McdonaldAbstract:Purpose Dysprosody is considered a core feature of childhood apraxia of speech (CAS), especially impaired production of lexical stress. Few studies have tested the effects of intervention for dyspr...
Carol Leonard - One of the best experts on this subject based on the ideXlab platform.
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the impact of parkinson s disease on vocal prosodic communication from the perspective of listeners
Brain and Language, 2006Co-Authors: Marc D Pell, Henry S Cheang, Carol LeonardAbstract:An expressive disturbance of speech prosody has long been associated with idiopathic Parkinson's disease (PD), but little is known about the impact of Dysprosody on vocal-prosodic communication from the perspective of listeners. Recordings of healthy adults (n=12) and adults with mild to moderate PD (n=21) were elicited in four speech contexts in which prosody serves a primary function in linguistic or emotive communication (phonemic stress, contrastive stress, sentence mode, and emotional prosody). Twenty independent listeners naive to the disease status of individual speakers then judged the intended meanings conveyed by prosody for tokens recorded in each condition. Findings indicated that PD speakers were less successful at communicating stress distinctions, especially words produced with contrastive stress, which were identifiable to listeners. Listeners were also significantly less able to detect intended emotional qualities of Parkinsonian speech, especially for anger and disgust. Emotional expressions that were correctly recognized by listeners were consistently rated as less intense for the PD group. Utterances produced by PD speakers were frequently characterized as sounding sad or devoid of emotion entirely (neutral). Results argue that motor limitations on the vocal apparatus in PD produce serious and early negative repercussions on communication through prosody, which diminish the social-linguistic competence of Parkinsonian adults as judged by listeners.
Joanne Arciuli - One of the best experts on this subject based on the ideXlab platform.
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orthographically sensitive treatment for Dysprosody in children with childhood apraxia of speech using rest intervention
Developmental Neurorehabilitation, 2014Co-Authors: Patricia Mccabe, Kirrie J Ballard, Anita G Macdonalddsilva, Lauren J Van Rees, Joanne ArciuliAbstract:AbstractObjective: Impaired prosody is a core diagnostic feature of Childhood Apraxia of Speech (CAS) but there is limited evidence of effective prosodic intervention. This study reports the efficacy of the ReST intervention used in conjunction with bisyllabic pseudo word stimuli containing orthographic cues that are strongly associated with either strong-weak or weak-strong patterns of lexical stress. Methods: Using a single case AB design with one follow-up and replication, four children with CAS received treatment of four one-hour sessions per week for three weeks. Sessions contained 100 randomized trials of pseudo word treatment stimuli. Baseline measures were taken of treated and untreated behaviors; retention was measured at one day and four weeks post-treatment. Results: Children’s production of lexical stress improved from pre to post-treatment. Treatment effects and maintenance varied among participants. Conclusions: This study provides support for the treatment of prosodic deficits in CAS.