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PubMed1998

Evolution of linguistic diversity in a simple communication system.

This article reports on the current state of our efforts to shed light on the origin and evolution of linguistic diversity using synthetic modeling and artificial life techniques. We construct a simple abstract model of a communication system that has been designed with regard to referential signaling in nonhuman animals. We analyze the evolutionary dynamics of vocabulary sharing based on these experiments. The results show that mutation rates, population size, and resource restrictions define the classes of vocabulary sharing. We also see a dynamic equilibrium, where two states, a state with one dominant shared word and a state with several dominant shared words, take turns appearing. We incorporate the idea of the abstract model into a more concrete situation and present an agent-based model to verify the results of the abstract model and to examine the possibility of using linguistic diversity in the field of distributed AI and robotics. It has been shown that the evolution of linguistic diversity in vocabulary sharing will support cooperative behavior in a population of agents.

Animal Communication↗
PubMed1990

Linguistic performance in schizophrenia: a comparison of acute and chronic patients.

A computer-assisted analysis of samples of free speech from acute schizophrenics (n = 50), chronic schizophrenics (n = 27) and normal subjects (n = 50) enabled a comparison of the linguistic profiles of the three groups. The chronic group consistently emerged as the most impaired, on measures of complexity, integrity (error) and fluency of speech, with the acute patients performing less well than normal speakers but better than chronic patients. Demographic differences could account for only a small number of the linguistic differences. A comparison of chronic schizophrenics from the community and those from long-stay wards suggested that their poor linguistic performance was in some way related to the illness process and not to institutionalisation. Three possible explanations for these results were considered, particularly the possibility that low complexity of speech, negative symptoms and poor outcome are in some way related.

Acute Disease↗
PubMed2006

Effect of modality on spelling words varying in linguistic demands.

The purpose of this study was to determine the extent to which spelling accuracy is influenced by response modality. A spelling list consisting of 40 words that varied in linguistic complexity was administered to students in Grades 2 through 6. Each student completed three tasks: (a) a words-per-minute measure to determine keyboarding proficiency, (b) spelling a word list via handwriting, and (c) spelling a word list on a computer. Independent variables included response modality, linguistic complexity, and grade level. Dependent measures included the percent words spelled correctly. Keyboarding proficiency was included as a covariate. Modality rarely affected spelling accuracy, regardless of the linguistic complexity of the target words. These findings suggest that spelling knowledge draws on modality-free, lexical representations stored in long-term memory. Further, they suggest that computer-based instruments are a viable option for spelling assessment.

Adolescent↗
PubMed2006

Subtypes of written expression in elementary school children: a linguistic-based model.

The purpose of this study was to provide a reliable and valid classification scheme for written expression that captured the linguistic variability present in a typical elementary school sample. This empirically derived classification model was based on the following linguistic-based writing skills: (a) understandability of discourse, (b) grammar, (c) semantics, (d) spelling, and (e) reading comprehension. The sample included 257 fourth-grade (n = 142) and fifth-grade (n = 115) students (46.3% boys, 79.4% White, age range = 8;3-11;7 years; M = 10.10). All of the students were receiving their writing instruction in the regular education setting, with approximately one third receiving some type of educational assistance. The sample fell in the middle socioeconomic stratum. Cluster analytic techniques derived different possible solutions. Results of a series of internal validity studies provided strong evidence that the six-cluster solution was both stable and interpretable, with subtypes reflecting normal as well as writing disability variants. Further, the writing disability subtypes ranged from global impairment to more specific linguistic impediments. Based on their characteristics, the clusters were named (a) Average Writers (n = 102), (b) Low Semantics (n = 31), (c) Low Grammar (n = 18), (d) Expert Writers (n = 33), (e) Low Spelling-Reading (n = 13), and (f) Poor Text Quality (n = 60). Subtypes differed on the percentages of children in selected subtypes manifesting specific writing deficits as well as on selected aspects of measures of metacognition, self-efficacy, and self-regulation of the writing process. Results provide researchers with a foundation to further investigate the underlying neurolinguistic and neurocognitive processes that may strengthen or undermine students' ability to produce a quality written product and to design and implement intervention techniques to address the various subtype patterns inherent in a regular elementary school classroom.

Analysis of Variance↗
PubMed2001

Genetic structures and linguistic boundaries in Italy: a microregional approach.

The amount of genetic data (sequences, gene frequencies, and isonymy) available for the Province of Ferrara, Italy, makes this area one of the world's best known. In an effort to infer the underlying demographic processes, we studied the province's population structure by comparing geological, palaeoclimatic, archeological, historical, and linguistic data. This multilevel approach allowed us to date some characteristics of the population structure from prehistoric times to the Roman and Middle Ages, and to detect overlapping biological, cultural, and geographic boundaries. To detect linguistic boundaries within this area we turned pronunciation differences into phonetic notation. We then computed pairwise distances by using methods for multiple genetic sequence analysis, in order to obtain a distance matrix of the overall pronunciation variability. This approach enabled us to test the association among linguistic, geographical, and genetic distance matrices using the same statistical tests. Results indicate that demographic phenomena can be traced in an area as small as the Province of Ferrara and that, on a microregional scale, recent events may have influenced important aspects of the overall genetic variation.

Genetics, Population↗
PubMedDate not supplied

[Linguistic and narrative variables in oral and written language disorder].

BACKGROUND: A study of linguistic and narrative variables in oral and written language disorder. AIM: To characterize the linguistic and narrative productivity, oral and written productions, of scholars with oral and written language disorder. METHOD: Oral and written narrative productions of 30 scholars from public schools (male and female aged 7 to 13 years) were compared. These individuals were grouped as follows: Research group (15) and Control group (15). Samples of oral and written narratives of the story "Little Red Riding Hood" were collected. Comparative analyses were made between the oral and written productions--intragroup (t Student Test and Wilcoxon Test) and intergroup (t Student Test and Mann Whitney Test)--according to the following linguistic variables: total number of words, of nouns, of verbs, of verbs in the past tense, of adjectives, of time markers, of complete statements, of incomplete statements and of reported episodes. Narratives were also compared according to the presence of episodes. RESULTS: Differences were observed between the oral and written productions for the research group regarding the total number of produced words (p = 0.018) and the total number of produced verbs (p = 0.030). The use of time markers such as before (p < 0.001), then (p < 0.001), when (p < 0.001), and after (p = 0.003), and the number of reported episodes, also indicated statistical differences when comparing the groups. CONCLUSION: The following variables characterized the research group: longer extensions of oral lexical productivity when comparing these to the written productions, less frequent use of time markers and fewer number of certain episodes in the written modality.

Adolescent↗
PubMed2006

[Behavioral study of denture acceptance. Part 1 qualitative investigation of linguistic data and validity of coding process].

PURPOSE: The purpose of this study was to extract questionnaire items based on qualitative data from edentulous patients obtained by individual interview. METHODS: Forty-three patients (20 complete denture, 20 partial denture and three non-denture wearers) who had visited the dental hospital affiliated to Nihon University School of Dentistry at Matsudo voluntarily agreed to be interviewed about their denture use with ten questions structured by Triandis theory in an open-rended manner. Responses to interview were recorded by voice recorder and qualitatively analyzed into linguistic and coded items, i.e. fragmentation and editing of recorded data followed by linguistic coding. The coded items were then classified into one of the 4 domains of Triandis theory: intentions of their denture acceptance (I), social factor (SF), affect (A) and perceived consequences (PC). RESULTS: The analysis of qualitative data, description, fragmentation and editing, accumulated 722 linguistic items. These were summarized into 72 codes, and classified into twelve I, nine SF, nine A and 42 PC. CONCLUSIONS: The 72 coded items, which summarized the edentulous qualitative data including the 4 domains of Traindis theory, are considered useful as questionnaire items of behavioral investigation. Further large-scale studies using this questionnaire will be needed to clarify the reasons for denture acceptance.

Aged↗
PubMed1992

Is stuttering due to a deficient comprehension of linguistic structures?

The results of two studies with 19 stutterers of two educational levels show that stutterers with more education stutter less but judge boundary depths in sentences better than stutterers with less education. This finding suggests that, among stutterers, the amount of stuttering and the comprehension of linguistic structures correlate negatively. These results gave rise to the loaded assumption that stuttering may be based on a deficiency in central linguistic processes. However, a third study with 20 nonstutterers leads to the conclusion that this does not hold for the imaginable continuum from nonstuttering to stuttering: for both educational levels nonstutterers do not differ from stutterers in judging constituent boundaries. This outcome does not support that stuttering may be based on a shortcoming in central linguistic processes but rather on a shortcoming in speech production at the level of articulation.

Educational Status↗
PubMed2004

Possible influence of linguistic musical background on perceptual pitch-matching tasks: a pilot study.

Linguistic background has been identified as important in the perception of pitch, particularly between tonal versus nontonal languages. In addition, a link between native language and the perception of musical pitch has also been established. This pilot study examined the perception of pitch between listeners from tonal and nontonal linguistic cultures where two different styles of music originate. Listeners were 10 individuals born in China who ranged in age from 25 to 37 years and had spent on the average 30 mo. in the USA and 10 individuals, born on the Indian subcontinent, who ranged in age from 22 to 31 years, and had spent an average of 13 mo. in the USA. Listeners from both groups participated in two conditions. One condition involved listening to a selection of music characteristic of the individual's culture (China, pentatonic scale; Indian subcontinent, microtones), and one condition involved no music. All listeners within each condition participated in two voice pitch-matching tasks. One task involved matching the lowest and highest pitch of tape-recorded voices to a note on an electronic keyboard. Another task involved matching the voice pitch of tape-recorded orally read words to a note on the keyboard. There were no differences between the two linguistic groups. Methodological limitations preclude generalization but provide the basis for further research.

Adolescent↗
PubMed1999

Holding emotional and linguistic rulers up to the poetry of Robert Frost.

The words in a large and representative sample of Robert Frost's poetry were compared with information in several data bases which provided estimates of the poetry's pleasantness, arousal, emotionality, imagery, and linguistic complexity. Findings confirmed that Frost's poetry was linguistically simple and emotionally restrained in comparison to that of his cohort. They also highlighted the increasing variability in Frost's poetry across time and its decreasing imagery. Frost's poetry was more restrained than that of his male cohort but similar to the poetry of his female cohort in its linguistic simplicity. Frost's acknowledged death poems were in fact quite pleasant and passive in emotional tone.

Arousal↗
PubMed1988

Acquisition of linguistic procedures for printed words: neuropsychological implications for learning.

A microcomputerized experiment, administered to 45 children in the 2nd, 5th, and 8th month of first grade, manipulated three variables: (a) stimulus unit (whole word or letter-by-letter presentation), (b) nature of stimulus information (phonically regular words, phonically irregular words, nonsense words, and letter strings, which differ in whether phonemic, orthographic, semantic, and/or name codes are available), and (c) linguistic task (lexical decision, naming, and written reproduction). Letter-by-letter presentation resulted in more accurate lexical decision and naming but not more accurate written reproduction. Interactions between nature of stimulus information and linguistic task occurred. Throughout the year, accuracy was greater for lexical decision than for naming or written reproduction. The superiority of lexical decision cannot be attributed to the higher probability of correct responses on a binary choice task because only consistently correct responses on repeated trials were analyzed. The earlier development of lexical decision, a receptive task, than of naming or written reproduction, production tasks, suggests that hidden units (Hinton & Sejnowski, 1986) in tertiary cortical areas may abstract visual-linguistic associations in printed words before production units in primary cortical areas can produce printed words orally or graphically.

Awareness↗
PubMed1984

Aspects of the linguistic competence of deaf children.

In this paper the following three issues are considered in the light of recent research: Do severely/profoundly deaf children develop a grammar for English? Evidence is presented which suggests that they do and that this grammar displays a number of general characteristics some of which parallel the language of younger hearing children, others that do not. The limitations of this grammar will be discussed and hypotheses about the nature, origins and inevitability of such limitations explored. In what ways do the linguistic experiences of deaf children differ from that of hearing children? Some aspects of the deaf child's experience of language will be explored and their linguistic and psychological implications discussed. The relationships between current research findings on the linguistic development of the deaf and the possibility of improved educational methods will also be explored to consider the various different philosophies currently being debated in this field.

Association↗
PubMed2005

Interpersonal comparison of subjective probabilities: toward translating linguistic probabilities.

Interpersonal variability in understanding linguistic probabilities can adversely affect decision making. Using the fact that everyone judges canonical probability events similarly in a manner consistent with axiom systems that yield a probability measure, we developed and tested a method for comparing the meanings of probability phrases across individuals. An experiment demonstrated that despite extreme heterogeneity in participants' linguistic probability lexicons, interpersonal similarity in phrase meaning is well predicted by phrase rank order within the lexicons. Thus, equally ranked phrases have similar meanings, and individual differences in linguistic probabilities may simply be explained by the phrases people use at each rank.

Decision Making↗
PubMed1993

Developmental trends in the interaction between auditory and linguistic processing.

The developmental course of multidimensional speech processing was examined in 80 children between 3 and 6 years of age and in 60 adults between 20 and 86 years of age. Processing interactions were assessed with a speeded classification task (Garner, 1974a), which required the subjects to attend selectively to the voice dimension while ignoring the linguistic dimension, and vice versa. The children and adults exhibited both similarities and differences in the patterns of processing dependencies. For all ages, performance for each dimension was slower in the presence of variation in the irrelevant dimension; irrelevant variation in the voice dimension disrupted performance more than irrelevant variation in the linguistic dimension. Trends in the degree of interference, on the other hand, showed significant differences between dimensions as a function of age. Whereas the degree of interference for the voice-dimension-relevant did not show significant age-related change, the degree of interference for the word-dimension-relevant declined significantly with age in a linear as well as a quadratic manner. A major age-related change in the relation between dimensions was that word processing, relative to voice-gender processing, required significantly more time in the children than in the adults. Overall, the developmental course characterizing multidimensional speech processing evidenced more pronounced change when the linguistic dimension, rather than the voice dimension, was relevant.

Adult↗
PubMed2002

Ethnohistorical processes, demographic structure and linguistic determinants of the Island of Vis.

The present paper aims at describing the most relevant background data on geomorphological, economic, ethnohistoric, demographic and linguistic features of the island of Vis. As an introduction to future holistic anthropological research on the island, it seeks to identify both internal and external impulses of change and/or continuity of the island population structure within a wider socio-cultural and historical context. The ethnohistorical and demographic data indicate a higher degree of isolation throughout history as compared to other islands in the region and a continuous depopulation trend during the last century. The analysis of the existing linguistic data on two main settlements shows a certain amount of intradialectal micro-differentiation, which is mainly due to various social and non-linguistic reasons.

Anthropology, Cultural↗
PubMedDate not supplied

[SENTREP test: two lists of sentences of equal length to check the attention and the presence of linguistic maturity problems].

INTRODUCTION: Comparing the syntactic complexity of the sentences, in addition to its length, may help detect the linguistic weaknesses of Spanish-speaking subjects. OBJECTIVES: The test consists of two lists of sentences of similar length: a list of sentences of well-controlled length, based on the repetition of bisyllabic words (such as the ones suggested by Kagan & Klein) and adding length to the sentences in two syllables steps; and a parallel list where a series of linguistic complexities are included (negatives, persons, numbers, tenses, composite or multiple verbs, relatives, etc) where length increases one syllable at a time. MATERIAL AND METHODS: We administered this test to 41, 44, 62 and 18 student aged 6, 9, 12 and 15 at a upper-class school in Bogotá; and to parallel groups of 20 gifted students (in a school for gifted children near Bogotá) and 40 disabled Hispanic non-readers attending an independent special program. RESULTS: Below a certain developmental level (the age of 9) student must face complexity as one more difficulty that diminishes the length of the repeated sentence. On the contrary: after this age, their mastery of the structure of language acts as a leading thread that allows the repetition of longer and longer sentences, much longer than their simple attention span. CONCLUSIONS: This diagnostic approach adds an unexpected approach to the very quick observation and detection of both attentional and linguistic problems.

Adolescent↗
PubMed2004

Linguistic analysis: terms and phrases used by patients in e-mail messages to nurses.

While some researchers are focusing on mapping free-text within health care fields into controlled vocabularies and classifications, many researchers are focusing on consumers' vocabularies. Using natural language processing (NLP) tools, such as MetaMap, to extract and map into terms in a controlled vocabulary is one way of understanding the pattern of terms used by lay people. Before an NLP tool can be effectively and efficiently used to extract concepts and create machine-understandable interpretations of the data, the appropriateness of the tool needs to be determined. This study aims were to determine the appropriateness of linguistic meaning captured for terms and phrases used by patients in electronic mail messages to nurses, using nursing-specific MetaMap output. Twenty messages were randomly selected from the 241 messages data set. Results indicated that four out of six nursing classification systems captured more than 50 % of the parsed word's linguistic meaning. This study demonstrates that it is possible to automatically extract and capture the linguistic meaning of the terms patients use in their electronic mail messages.

Electronic Mail↗
PubMed2005

On learning to draw the distinction between physical and metaphorical motion: is metaphor an early emerging cognitive and linguistic capacity?

Situated within the framework of the conceptual metaphor theory (Lakoff & Johnson, 1999), this study investigated young children's understanding of metaphorical extensions of spatial motion. Metaphor was defined as a conceptual-linguistic mapping between a source and a target domain. The study focused on metaphors that are structured by the source domain of motion in space (e.g. time flies by, ideas pass through one's mind, sickness crawls through one's body). The study investigated whether metaphor comprehension varied by the age of the participant, target domain of the metaphorical mapping, and the conventionality of the linguistic form with which the metaphor was conveyed. Data were gathered using a story comprehension task and a semi-structured interview from 60 monolingual Turkish-speaking children, at the mean ages 3;6, 4;5 and 5;5 (20 participants per age group), and 20 adult native speakers of Turkish. The results showed metaphor understanding to be an early emerging cognitive and linguistic capacity.

Child, Preschool↗