The acquisition of argument structures of intransitive and transitive verbs in Japanese: The role of parental input

The present study investigated the role of morphosyntactic information in the acquisition of transitive and intransitive verb argument structures (VAS) in the Japanese language, which allows massive omissions of arguments and case markers. In particular, we investigated how the ‘variation sets’ proposed by Küntay and Slobin work in Japanese. Longitudinal interaction data from three Japanese-speaking mother–child pairs were collected at five different times between the ages of 0;10 and 3;01. Children’s acquisition of VAS and mothers’ use of verbs were examined, including morphologically related verbs in a variety of sentence frames with null and overt arguments. The results indicate that all three mothers showed an increase in overt arguments in different syntactic roles as well as lexical given arguments around the time that children started uttering words. However, the use of a variety of sentence frames with null and overt arguments was not uniform among the mothers, and such individual differences were related to the acquisition of VAS among children. These findings support the role of ‘variation sets’ in the acquisition of VAS in Japanese and suggest that the availability of morphosyntactic information in the input helps children to reconstruct VAS.

Concerto

The term concerto has been applied to music works since the early 16th century, first appearing in treatises almost a century later. Reflecting the sense of two or more forces either contending with or working together with someone (both Latin), or “arrange, agree, get together” (Italian), early concertos combined voices and instruments with no other formal consequences. These characteristics remain with the genre throughout its history. Only with the emergence of the instrumental, non-texted concerto in the late 17th century did structure begin to become an issue. Two important formal trends regarding the concerto dominate the 18th century. The most pervasive overall form is that of three movements, fast-slow-fast. The form of the first movement has attracted the most attention in the literature. Concertos in the first half of the 18th century, emanating from Italy and spreading northward, start with some version of ritornello form, which is also used in arias. In the latter part of the century, first movements increasingly take on the characteristics of sonata form, found in symphonies and sonatas, resulting in first movement concerto form or concerto-sonata form. The actual nature of the merging of the two ideas in any given work remains a vibrant topic. In one sense, the influence of the two forms, ritornello and sonata, has declined since Beethoven, giving way to other compositional concerns, yet the forms can often lurk in the background of the genre. The breadth of works that fall under the descriptive term concerto can be exasperating. Concerto also embraces a number of subgenres. The earliest works are known as vocal concertos or sacred concertos (many of them were sacred pieces), but do not always bear the designation. They are performed in stile concertato, using diverse musical forces. The term remains applicable to certain textures. The concerto grosso, connected with the Baroque, is another subgenre. Yet another subgenre is the symphonie concertante, which emerged in 18th-century France. This subgenre passed in popularity, but the term concertante continues to be applied to the texture. Later developments made use of other textures, though the symphonic concerto, originating in the 19th century, might be seen as derivative of earlier approaches. These styles and textures are major factors in many other works not called concertos, such as variation sets, fantasies, and even symphonies, to name a few.

Variation sets in the speech directed to toddlers in Argentinian households.SES and type of activity effects

The study adopts a naturalistic perspective, looking at the relationship between socio-economic status (SES), activities and variation sets in child-directed speech (CDS) to Spanish-speaking Argentinian toddlers. It aims to determine the effect of SES and type of activity on the proportion of words and utterances in variation sets and on the pragmatic function they serve in interaction. Thirty two children (mean: 14.3 months) and their families were audio-recorded for four hours and the middle two hours were analyzed using CLAN. We developed an automatic algorithm for variation sets extraction that compares noun, verb and adjective lexemes in successive utterances. Mixed-effects beta regression showed SES and activity type effects on the proportion of variation sets and on the pragmatic function served by variation sets. Findings revealed that the contextual variables considered impact on how interlocutors organize the information to young children at the local level of natural at home interactions.

How to Read a Rondeau: On Pleasure, Analysis, and the Desultory in Amateur Performance Practice of the Eighteenth Century

Written in the form and style of the popular “novel of circulation” (or “it-narrative”), this article examines and provides an experience of the performance practices of eighteenth-century amateur music. It tells the typically complex history of a minor hit, “Come Haste to the Wedding,” a tune that was sung in a 1760s Drury Lane pantomime, rewritten as a rondeau for London publishers, danced as a jig in Irish and Scottish halls, transcribed as a fiddle tune by a captain in the Continental Army, circulated as a flute or guitar melody as far abroad as Calcutta, and collected by a young loyalist in Charleston, South Carolina. I argue that common to all these versions—and among many similar and neglected amateur genres, including sectional variation sets and dance collections—was the practice of desultory reading. The term “desultory” itself comes from the period, and the practice suggested here extrapolates from evidence of readers' experience of approaching literature and periodicals out of order. Many musical texts asked readers to skip between pages and sections, rondeaux chief among them but also instructional treatises. Some of those same treatises, by C. P. E. Bach (1753–62) and Quantz (1752), hint at desultory reading in subtle admonitions. Through a lively engagement with period style, this article outlines a new definition of music reading informed by eighteenth-century language and practical context, a definition attuned to the ocular and physical habits of the era's most plentiful practitioners: domestic performers of domestic music.

Parental Speech to Typical and Atypical Populations: A Study on Linguistic Partial Repetition

Parents often use partial self-repetitions with variation in successive utterances (e.g.,Want to get your ball? Get your ball? Do you want to get your ball?). Such ’variation sets’ contain latent distributional information about the building blocks of language andare predictive of children’s lexical and grammatical structures. Because these properties in parents of atypically developing children are virtually unknown, we compared for the first time variation sets in parental speech directed to toddlers with Autistic Spectrum Disorders (ASD), Down Syndrome (DS), and a baseline group of Typically Developing toddlers (TD). In Study 1, we analyzed transcripts of mothers’ child-directed utterancesduring naturalistic dyadic play interactions. While children’s mean developmental age was the same across the three groups, we found that measures of partial repetitions in child-directed speech were larger in the ASD than in the DS and typical groups. In Study 2 we also found that these larger measures in the ASD group were mainly driven by the mother, as opposed to the father. Because partial repetitions decrease with chronological age of the child in typical groups, and the atypical children were older than the TD group, our findings suggest compensating modes of communication in parental speech to atypical populations, especially the ASD group. The study validates the extension of structural/statistical analyses of language to compare parental communication to typical and atypical populations

The Spanish Verbs Estar (To Be) and Ser (To Be) in Child-Directed Speech

The verbs ser and estar have been a subject of great debate in the literature, mainly because the adjectives that are combined with each copula are not in complementary distribution. A cognitive linguistics approach proposes that estar allows for a comparison of the entity referred to by the utterance’s subject and that very same entity that goes through a temporal change; on the other hand, ser allows for a comparison among entities of different type (Delbecque, 1997). I provide an analysis of spontaneous child-directed speech from a longitudinal database and find variation sets that may allow children to detect the differences between ser and estar. In child-directed speech, the entities referred to by the subject of a sentence with estar are always entities that undergo a perceptible change within an activity of daily life, while the entities referred to with ser never undergo a change.

SES effects on the use of variation sets in child-directed speech

Socio-economic status (SES) impacts the amount and type of input children hear in ways that have developmental consequences. Here, we examine the effect of SES on the use of variation sets (successive utterances with partial self-repetitions) in child-directed speech (CDS). Variation sets have been found to facilitate language learning, but have been studied only in higher-SES groups. Here, we examine their use in naturalistic speech in two languages (Hebrew and English) for both low- and high-SES caregivers. We find that variation sets are more frequent in the input of high-SES caregivers in both languages, indicating that SES also impacts structural properties of CDS.

Cell-to-cell variation sets a tissue-rheology–dependent bound on collective gradient sensing

When a single cell senses a chemical gradient and chemotaxes, stochastic receptor–ligand binding can be a fundamental limit to the cell’s accuracy. For clusters of cells responding to gradients, however, there is a critical difference: Even genetically identical cells have differing responses to chemical signals. With theory and simulation, we show collective chemotaxis is limited by cell-to-cell variation in signaling. We find that when different cells cooperate, the resulting bias can be much larger than the effects of ligand–receptor binding. Specifically, when a strongly responding cell is at one end of a cell cluster, cluster motion is biased toward that cell. These errors are mitigated if clusters average measurements over times long enough for cells to rearrange. In consequence, fluid clusters are better able to sense gradients: We derive a link between cluster accuracy, cell-to-cell variation, and the cluster rheology. Because of this connection, increasing the noisiness of individual cell motion can actually increase the collective accuracy of a cluster by improving fluidity.

Phenotypic variation explains food web structural patterns

Food webs (i.e., networks of species and their feeding interactions) share multiple structural features across ecosystems. The factors explaining such similarities are still debated, and the role played by most organismal traits and their intraspecific variation is unknown. Here, we assess how variation in traits controlling predator–prey interactions (e.g., body size) affects food web structure. We show that larger phenotypic variation increases connectivity among predators and their prey as well as total food intake rate. For predators able to eat only a few species (i.e., specialists), low phenotypic variation maximizes intake rates, while the opposite is true for consumers with broader diets (i.e., generalists). We also show that variation sets predator trophic level by determining interaction strengths with prey at different trophic levels. Merging these results, we make two general predictions about the structure of food webs: (i) trophic level should increase with predator connectivity, and (ii) interaction strengths should decrease with prey trophic level. We confirm these predictions empirically using a global dataset of well-resolved food webs. Our results provide understanding of the processes structuring food webs that include functional traits and their naturally occurring variation.