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At least 775 records · Page 43Linked to original sources
PubMed1994

Linguistic abilities in children with Williams-Beuren syndrome.

In recent studies children with Williams-Beuren syndrome (WBS) have been characterized as having a distinct neuropsychological profile with verbal abilities being superior to visuo-spatial and motor skills. An unusual command of language, including excessive use of verbal stereotypes, social phrases, and clichés has been noticed. The aim of this study is to establish whether the quality and quantity of verbal behavior, and the articulation and tonal quality of the voices of children with WBS differ from other children with nonspecific developmental disabilities. A group of 25 children with WBS and a control group of 25 children matched for age (4-10 years), sex (12 girls; 13 boys), and non-verbal reasoning abilities (mean IQ = 79) were investigated. The Heidelberg Language Development Test and a picture story were administered. The mothers were asked to answer a questionnaire to assess the articulation and the vocal characteristics of their children. The results show that children with WB syndrome do not differ in most qualitative and quantitative tasks with regard to verbal competence. They produce significantly more correct plural-singular formations than the control children (t = 2.49, P < 0.01) on a primitive level of grammatical competence. In general, their articulation was reported to be more exact and clear (t = -2.73, P < 0.006). More mothers of children with WBS noticed a production of stereotypes, the use of social phrases, and clichés than did mothers of the control children (Chi square = -6.67 P < 0.005). Children with WBS were less likely to lisp as compared to the control children (Chi square = 2.08, P = 0.074).(ABSTRACT TRUNCATED AT 250 WORDS)

Articulation Disorders↗
PubMed1988

Genetic variation within a linguistic group: Apalai-Wayana and other Carib tribes.

A total of 136 individuals were studied in relation to 31 genetic systems, and the results were compared with South American Indian averages and previous surveys on the Wayana of French Guiana and Surinam. The information was afterwards integrated with data from other Carib groups, and two types of genetic distances (Nei's and Edwards') were calculated a) between five groups, considering ten systems; and b) between nine groups, using five systems. The two measures of genetic distances correlated well (Spearman's correlation coefficient around 0.70), and there was good agreement between the geographical and genetic distances. All analyses indicated a peripheral position for the Apalai-Wayana and their distinctiveness from the Wayana of French Guiana and Surinam, suggesting that intertribal fusions may play an important role in the genetic differentiation of these populations.

Anthropology, Physical↗
PubMed2007

Neural basis of first and second language processing of sentence-level linguistic prosody.

A fundamental question in multilingualism is whether the neural substrates are shared or segregated for the two or more languages spoken by polyglots. This study employs functional MRI to investigate the neural substrates underlying the perception of two sentence-level prosodic phenomena that occur in both Mandarin Chinese (L1) and English (L2): sentence focus (sentence-initial vs. -final position of contrastive stress) and sentence type (declarative vs. interrogative modality). Late-onset, medium proficiency Chinese-English bilinguals were asked to selectively attend to either sentence focus or sentence type in paired three-word sentences in both L1 and L2 and make speeded-response discrimination judgments. L1 and L2 elicited highly overlapping activations in frontal, temporal, and parietal lobes. Furthermore, region of interest analyses revealed that for both languages the sentence focus task elicited a leftward asymmetry in the supramarginal gyrus; both tasks elicited a rightward asymmetry in the mid-portion of the middle frontal gyrus. A direct comparison between L1 and L2 did not show any difference in brain activation in the sentence type task. In the sentence focus task, however, greater activation for L2 than L1 occurred in the bilateral anterior insula and superior frontal sulcus. The sentence focus task also elicited a leftward asymmetry in the posterior middle temporal gyrus for L1 only. Differential activation patterns are attributed primarily to disparities between L1 and L2 in the phonetic manifestation of sentence focus. Such phonetic divergences lead to increased computational demands for processing L2. These findings support the view that L1 and L2 are mediated by a unitary neural system despite late age of acquisition, although additional neural resources may be required in task-specific circumstances for unequal bilinguals.

Adult↗
PubMedDate not supplied

Cross-linguistic evidence for morphological representation in the mental lexicon.

Three types of naturally occurring data address the question of morphological structure in the lexical entry: code-switching, novel forms, and speech errors. The data were collected from a wide variety of languages, including Austro-Polynesian, Semitic, and Altaic languages, and a heretofore untapped set of affixation types, including infixes, circumfixes, multiple affixes, reduplication, and nonconcatenative morphology. The data are used to argue for a dual-listing model of lexical representation (e.g., Pinker, 1991; Frauenfelder & Schreuder, 1992) over full-listing (e.g., Butterworth, 1983) and fully parsed (e.g., Taft & Forster, 1975) models. The paper posits three morphological parameters which are activated language-specifically.

Cognition↗
PubMed1994

Gene structure prediction by linguistic methods.

The higher-order structure of genes and other features of biological sequences can be described by means of formal grammars. These grammars can then be used by general-purpose parsers to detect and to assemble such structures by means of syntactic pattern recognition. We describe a grammar and parser for eukaryotic protein-encoding genes, which by some measures is as effective as current connectionist and combinatorial algorithms in predicting gene structures for sequence database entries. Parameters of the grammar rules are optimized for several different species, and mixing experiments are performed to determine the degree of species specificity and the relative importance of compositional, signal-based, and syntactic components in gene prediction.

Animals↗