Voice and speech functions (B310-B340)

The International Classification of Functioning, Disability and Health for Children and Youth (ICF-CY) domain ‘voice and speech functions’ (b3) includes production and quality of voice (b310), articulation functions (b320), fluency and rhythm of speech (b330) and alternative vocalizations (b340, such as making musical sounds and crying, which are not reviewed here)

Investigating the Evidence of Behavioral, Cognitive, and Psychiatric Endophenotypes in Autism: A Systematic Review

Substantial evidence indicates that parents of autistic individuals often display milder forms of autistic traits referred to as the broader autism phenotype (BAP). To determine if discrete endophenotypes of autism can be identified, we reviewed the literature to assess the evidence of behavioral, cognitive, and psychiatric profiles of the BAP. A systematic review was conducted using EMBASE, MEDLINE, PsycINFO, PsycEXTRA, and Global Health. Sixty papers met our inclusion criteria and results are discussed according to the proportion of studies that yield significant deficits per domain. The behavioral, cognitive, and psychiatric endophenotypes in parents of autistic probands are still not clarified; however, evidence suggests mild social/communication deficits, rigid/aloof personality traits, and pragmatic language difficulties as the most useful sociobehavioral candidate endophenotype traits. The existence of deficits in the cognitive domain does suggest familial vulnerability for autism. Furthermore, increased depressed mood and anxiety can also be useful markers; however, findings should be interpreted with caution because of the small number of studies in such heterogeneously broad domains and several methodological limitations

A language-familiarity effect for speaker discrimination without comprehension

The influence of language familiarity upon speaker identification is well established, to such an extent that it has been argued that “Human voice recognition depends on language ability” [Perrachione TK, Del Tufo SN, Gabrieli JDE (2011) Science 333(6042):595]. However, 7-mo-old infants discriminate speakers of their mother tongue better than they do foreign speakers [Johnson EK, Westrek E, Nazzi T, Cutler A (2011) Dev Sci 14(5):1002–1011] despite their limited speech comprehension abilities, suggesting that speaker discrimination may rely on familiarity with the sound structure of one’s native language rather than the ability to comprehend speech. To test this hypothesis, we asked Chinese and English adult participants to rate speaker dissimilarity in pairs of sentences in English or Mandarin that were first time-reversed to render them unintelligible. Even in these conditions a language-familiarity effect was observed: Both Chinese and English listeners rated pairs of native-language speakers as more dissimilar than foreign-language speakers, despite their inability to understand the material. Our data indicate that the language familiarity effect is not based on comprehension but rather on familiarity with the phonology of one’s native language. This effect may stem from a mechanism analogous to the “other-race” effect in face recognition

Can monolinguals be like bilinguals? Evidence from dialect switching

Bilinguals rely on cognitive control mechanisms like selective activation and inhibition of lexical entries to prevent intrusions from the non-target language. We present cross-linguistic evidence that these mechanisms also operate in bidialectals. Thirty-two native German speakers who sometimes use the Öcher Platt dialect, and thirty-two native English speakers who sometimes use the Dundonian Scots dialect completed a dialect-switching task. Naming latencies were higher for switch than for non-switch trials, and lower for cognate compared to non-cognate nouns. Switch costs were symmetrical, regardless of whether participants actively used the dialect or not. In contrast, sixteen monodialectal English speakers, who performed the dialectswitching task after being trained on the Dundonian words, showed asymmetrical switch costs with longer latencies when switching back into Standard English. These results are reminiscent of findings for balanced vs. unbalanced bilinguals, and suggest that monolingual dialect speakers can recruit control mechanisms in similar ways as bilinguals

Evaluation of the Speech and Language Therapy Service of Tallaght West Childhood Development Initiative

A retrospective evaluation of the Childhood Development Initiative (CDI) Speech and Language Therapy Service was undertaken. The design consisted of two strands. The first was quantitative and examined the referral, uptake and outcomes of the service. The second was qualitative and looked at the implementation. The main research questions were organised according to implementation of the programme; uptake and accessibility; and outcomes.  The results of this evaluation suggest that the service succeeded in receiving referrals, assessing and intervening with 192 children in Tallaght West at an age when they were extremely unlikely to have been seen by any other local service and without waiting for a long period of time. Parents echoed these findings by reporting that their children were more ready for school as a result of the intervention. Parents and staff were in agreement that the model was a positive and welcome alternative to traditional clinic-based therapy delivery, in terms of its on-pre-school site location, which meant the SLTs were literally and figuratively accessible to children, parents, practitioners and teachers

Communication disorders and indigenous Australians : a synthesis and critique of the available literature

Purpose: To synthesise and critique the available diverse literature related to communication disorders experienced by Indigenous Australians. This is in order to provide health professionals with a resource guide for evidence based decision making. The review has a specific focus on prevalence, assessment and effective treatment of communication disorders and explores these across the lifespan. Method: A three phase systematic search process was adopted. A number of key databases, speech pathology journals and grey literature sources were searched to obtain articles relevant to the research aims. Two researchers independently rated articles for inclusion as well as methodological quality using the Kmet rating tool. Data synthesis was completed by categorising articles according to communication disorder type and methodology used.. Each article was then summarised for key findings relating to the research aims. Results: A total of 85 articles rated highly relevant were included in the review. A total of 60% of the available literature was textual or grey literature and 40% was quantitative or qualitative studies. Methodological quality of the 34 quantitative and qualitative articles ranged from limited (13), adequate (2), good (5) to strong (14). The majority of articles focussed on hearing loss, language and early literacy. No articles were identified addressing voice or fluency disorders. Limited evidence was found for any of the areas addressed in the research aims. Conclusion: High quality scientific literature surrounding Indigenous communication disorders is limited. The available sources of information favoured textual papers or ‘grey’ literature government sources. Very little published scientific quantitative or qualitative studies are available to address the issues of prevalence, assessment or treatment of specific communication disorders. Given the likelihood of the burden of communication disorders amongst this population, the lack of evidence is concerning. The complexities of conducting research within the Indigenous Australian population are acknowledged and whilst empirical scientific evidence is still lacking, the last five years has seen greater focus and commitment to improving the knowledge base with higher quality scientific research being conducted