Temporal patterns in human movement, and in speech in particular, occur on multiple timescales. Regularities in such patterns have been observed between speech gestures, which are relatively quick movements of articulators (e.g., tongue fronting and lip protrusion), and also between rhythmic units (e.g., syllables and metrical feet), which occur more slowly. Previous work has shown that patterns in both domains can be usefully modeled with oscillatory dynamical systems. To investigate how rhythmic and gestural domains interact, an experiment was conducted in (...) which speakers performed a phrase repetition task, and gestural kinematics were recorded using electromagnetic articulometry. Variance in relative timing of gestural movements was correlated with variance in rhythmic timing, indicating that gestural and rhythmic systems interact in the process of planning and producing speech. A model of rhythmic and gestural planning oscillators with multifrequency coupling is presented, which can simulate the observed covariability between rhythmic and gestural timing. (shrink)

La disminución de dopamina en los ganglios basales es la principal causa de la enfermedad de Parkinson. Además de las disfunciones motrices, los individuos con EP presentan alteraciones cognitivas que incluyen déficits de control atencional y temporal, de percepción del ritmo de la música y del habla, y de procesamiento del lenguaje. El circuito estriado-tálamo-cortical, participa en la comprensión musical y del habla. Personas con EP presentan problemas en distinguir las estructuras rítmicas por verse afectado el funcionamiento de los GB (...) y, por lo tanto, el control de su pulso interno en el CETC. Sin embargo, se ha encontrado que personas con EP pueden mejorar su sincronización temporal interna mediante el acompañamiento de señales auditivas externas temporalmente predecibles. Estudios argumentan que señales de este tipo pueden compensar la vía disfuncional CETC mediante una interface con el circuito cerebelo-tálamo-cortical el cual es sensible a la codificación de eventos temporales. (shrink)

Este artículo presenta un estudio descriptivo, cuyo propósito es determinar si el comportamiento rítmico del habla en lectura en voz alta de personas profesionales de ocho ciudades diferentes de Chile coincide con la clasificación dada históricamente al español como lengua de ritmo silábico, clasificación que además en general se extiende a todas las lenguas romances. Varios estudios tradicionales afirman que el español es una lengua de tendencia hacia el ritmo silábico, no obstante, también existen otros trabajos, antiguos y recientes, que (...) afirman lo contrario, esto es, que el español manifiesta un comportamiento rítmico de tipo acentual. Hasta el momento, no se ha realizado un estudio de este tipo sobre este tema para el español de Chile. En el presente trabajo, se analiza un corpus de lecturas obtenidas de una muestra de 30 informantes de distintas regiones del país. El análisis se realiza con procedimientos de medición instrumental que entregan indicadores cuantitativos que han sido propuestos recientemente en el ámbito de la investigación sobre prosodia y que le otorgan, además, mayor precisión y objetividad a los estudios acerca de este tema. Los resultados muestran que en el español de Chile, en la lectura en voz alta, se manifiesta una tendencia rítmica de tipo silábico, aunque comparativamente tiende a ser más acentual que los valores que se han dado para el español peninsular. En cuanto a la variación del español de Chile por zona geográfica, las diferencias son tan pequeñas que no es posible afirmar que la variable diatópica influye en el comportamiento rítmico del español de Chile, en situación de lectura. (shrink)

Temporal regularities in speech, such as interdependencies in the timing of speech events, are thought to scaffold early acquisition of the building blocks in speech. By providing on-line clues to the location and duration of upcoming syllables, temporal structure may aid segmentation and clustering of continuous speech into separable units. This hypothesis tacitly assumes that learners exploit predictability in the temporal structure of speech. Existing measures of speech timing tend to focus on first-order regularities among adjacent units, and are overly (...) sensitive to idiosyncrasies in the data they describe. Here, we compare several statistical methods on a sample of 18 languages, testing whether syllable occurrence is predictable over time. Rather than looking for differences between languages, we aim to find across languages (using clearly defined acoustic, rather than orthographic, measures), temporal predictability in the speech signal which could be exploited by a language learner. First, we analyse distributional regularities using two novel techniques: a Bayesian ideal learner analysis, and a simple distributional measure. Second, we model higher-order temporal structure—regularities arising in an ordered series of syllable timings—testing the hypothesis that non-adjacent temporal structures may explain the gap between subjectively-perceived temporal regularities, and the absence of universally-accepted lower-order objective measures. Together, our analyses provide limited evidence for predictability at different time scales, though higher-order predictability is difficult to reliably infer. We conclude that temporal predictability in speech may well arise from a combination of individually weak perceptual cues at multiple structural levels, but is challenging to pinpoint. (shrink)

This study investigated the possible prosodic transfer influences native regional dialects may have in the perception of English lexical stress by speakers of three Chinese dialects [Beijing (BJ), Changsha (CS), and Guangzhou (GZ)] compared to 20 American English (AE) speakers. F0, duration, intensity, and vowel reduction were manipulated in nonce disyllabic words. Participants performed four-word sequence recall tasks to identify lexical stress location. They performed better with natural sounds than with manipulated words. This study focused on the performance differences in (...) manipulating words. The results showed that all four-group members performed similarly processing F0 condition nonce words. BJ and CS participants were more accurate than GZ participants in duration and vowel reduction cues. Reaction time (RT) suggested that the processing time of acoustic cues differed significantly across language groups. The findings indicate that first language (L1) dialect effect is robust in second language (L2) stress perception tasks. (shrink)

Relationships between phonological and morphological complexity have long been proposed in the linguistic literature, with empirical investigations often seeking complexity trade-offs. Positive complexity correlations tend not to be viewed in terms of motivations. We argue that positive complexity correlations can be diachronically well-motivated, emerging from crosslinguistically prevalent processes of language change. We examine the correlation between syllable complexity and morphological synthesis, hypothesizing that the process of grammaticalization motivates a positive relationship between the two features. To test this, we conduct a (...) typological survey of 95 diverse languages and a corpus study of 21 languages with substantive corpora from the DoReCo project. The first study establishes a significant positive correlation between syllable complexity, measured in terms of maximal syllable patterns, and the index of synthesis. The second study tests the hypothesis that the relationship between syllable complexity and synthesis holds at local levels and within noun and verb types, as predicted by a grammaticalization account. While the findings of the corpus study are limited in their statistical power, the observed tendencies are consistent with our predictions. This study contributes important findings to the complexity literature, as well as a novel method which incorporates broad typological sampling and deep corpus analysis. (shrink)

When infants and toddlers are confronted with sequences of sounds, they are required to segment the sounds into meaningful units to achieve sufficient understanding. Rhythm has been regarded as a crucial cue for segmentation of speech sounds. Although previous intermodal methods indicated that infants and toddlers could detect differences in speech sounds based on stress-timed and syllable-timed units, these methods could not clearly indicate how infants and toddlers perform sound segmentation. Thus, the present study examined whether Japanese infants and toddlers (...) could segment word speech sounds comprising basic morae, on the basis of concurrent basic mora units within syllable units, using the new intermodal matching procedure. The results indicated that, regardless of their ages and linguistic abilities, Japanese infants and toddlers aged 6–25 months tended to segment Japanese words comprising basic morae sounds on the basis of concurrent basic mora units within syllable units. This implies that infants' and toddlers' use of syllable units for segmentation of speech sounds at an early age could be evident among many infants and toddlers learning various languages. Although this finding should be interpreted carefully, the present study demonstrated the utility of the new intermodal matching procedure for examining segmentation of speech sounds and word sounds by infants and toddlers, on the basis of specific rhythm units. (shrink)

Już w 1775 r. Joshua Steele sformułował tezę o występowaniu równych pod względem czasowym interwałów – nie tylko w muzyce, ale również w mowie ludzkiej. Tak zwana teoria izochronizmu stała się w późniejszym okresie wyjściowym kryterium dla typologicznego podziału języków świata pod względem zjawisk rytmicznych. Na podstawie badań akustyczno-audytywnych niemożliwe było jednak znalezienie empirycznych dowodów co do równości odstępów pomiędzy sylabami akcentowanymi w językach grupy stress-timed ani co do równego czasu trwania poszczególnych sylab w językach typu syllable-timed. Tak więc pierwotny (...) typologiczny podział języków według dwóch typów rytmicznych okazał się nieuzasadniony. Celem niniejszego artykułu jest ukazanie innych kryteriów typologicznego opisu języków pod względem rytmu, który ma duże znaczenie w dziedzinie językoznawstwa kontrastywnego oraz nauczania języków obcych. (shrink)