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Institute
In these conclusions we can deal only with some of the tentative comparative results of the workshop papers on the early development of verb morphology. The main focus is on criteria of how the child detects morphology and how this emerging morphological competence develops in its earliest phases. In view of the purpose and tentative character of these conclusions, all references will be limited to the papers of the workshop and to earlier studies by workshop participants within the "Crosslinguistic Project on Pre- and Protomorphology in Language Acquisition". Much more will be given in the projected final publication.
This 18th issue of ZAS-Papers in Linguistics consists of papers on the development of verb acquisition in 9 languages from the very early stages up to the onset of paradigm construction. Each of the 10 papers deals with first-Ianguage developmental processes in one or two children studied via longitudinal data. The languages involved are French, Spanish, Russian, Croatian, Lithuanien, Finnish, English and German. For German two different varieties are examined, one from Berlin and one from Vienna. All papers are based on presentations at the workshop 'Early verbs: On the way to mini-paradigms' held at the ZAS (Berlin) on the 30./31. of September 2000. This workshop brought to a close the first phase of cooperation between two projects on language acquisition which has started in October 1999:
a) the project on "Syntaktische Konsequenzen des Morphologieerwerbs" at the ZAS (Berlin) headed by Juergen Weissenborn and Ewald Lang, and financially supported by the Deutsche Forschungsgemeinschaft, and
b) the international "Crosslinguistic Project on Pre- and Protomorphology in Language Acquisition" coordinated by Wolfgang U. Dressler in behalf of the Austrian Academy of Sciences.
For this study one hundred sixty-seven Russian-/Turkish-German preschool children were tested with a battery of language proficiency tests in both languages. On the basis of 1.5 SD below monolingual norm for L2 German and 1.25 SD below bilingual mean for either home language, 9 children at risk of developmental language disorders (DLD) (mean age of 4 years and 5 months) were identified and 16 age-matched TD children were selected out of the cohort. All these children were tested with the LITMUS-MAIN and –SR tests in German. The results across TD and at risk of DLD group were compared. TD clearly outperformed at risk of DLD in SR. In elicited narratives, macrostructure and microstructure were scrutinized across groups. Similar to the previous findings, our results show significant differences between at risk of DLD und TD in the microstructure, e.g. total number of word tokens and verb-based communication units and SR. For the macrostructure, TD outperformed at risk children only for story complexity. The study expands our knowledge on the cut-off criteria for the identification of bilinguals at risk of DLD, scrutinized very early narratives for bilinguals at risk of DLD features and questions the similarity of cognitive skills in TD and at risk of DLD children.
In anaphora resolution theory, it has been assumed that anaphora resolution is based on a reversed mapping of antecedent salience and anaphora complexity: minimal complex anaphora refer to maximal salient antecedents. In order to ex-amine whether and by which developmental steps German children gain command of this mapping maxim we conducted an experiment on production and comprehension of intersentential pronouns including the three pronoun types zero, personal, and demonstrative pronoun. With respect to antecedent salience, the experiment varied syntactic role (subject/object) and in/animacy. Six age groups of children (age range from 2;0 to 6;0) and an adult control group has been tested. The hypothesis arising from the mapping maxim is that zero pronoun correlates with more salient antecedents than personal and demonstrative pronoun, the latter correlating with the least salient antecedents. The results are: In production, children first establish the opposition of zero pronoun with animate antecedents vs. demonstrative pronoun with inanimate antecedents. In a next step, syntactic role comes into play and a more complex system opposing the three presented pronoun types is established. In comprehension, however, the effect of pronoun type re-mains weak and antecedent features remain a strong factor in reference choice. However, also adults employ pronoun type and antecedent features. The oldest children and the adults show variation in personal pronoun resolution according to the animacy pattern of the potential antecedents. In case of identical animacy features, the subject is the preferred candidate; in case of distinct animacy features, there is a tendency to choose the object antecedent.
The 48th volume of the ZAS Papers in Linguistics presents selected papers from the conference on Intersentential pronominal reference in child and adult language held at the ZAS in December, 2006. The conference, organized by the project Acquisition and disambiguation of intersentential pronominal reference, brought together leading researchers dealing with anaphora resolution in diverse theoretical approaches and the acquisition perspective on pronominal reference taken by the ZAS project.
Introduction
(2000)
This study explores the relation between the development of narrative skills at the macrostructural level and the productive lexical abilities (verbs) of German-Russian children. The narratives are elicited using the Multilingual Assessment Instrument for Narratives (MAIN) and the lexical abilities are assessed using different tests. Twenty-one preschoolers (mean age: 3;9), forty-four 1st graders (mean age: 6;11) and twenty-two 3rd graders (mean age: 9;3) were included in the study. Correlation analyses were performed between verb lexicon and the following macrostructural components: Story Structure, Structural Complexity and Internal State Terms. The analysis also targets cross-language effects. In addition, the production of verbs within the elicited narratives was taken into account. Some positive correlations were found; however, no clear pattern across age groups and languages was observed. It is suggested that cognitive abilities might be a more decisive factor than lexical abilities and/or that the verbs assessed via the vocabulary tests are more specific than the ones required to achieve high scores for macrostructure.
This paper presents the Italian version of the Multilingual Assessment tool for Narratives (MAIN), describes how it was developed and reports on some recent uses of MAIN within the Italian context. The Italian MAIN has been used in different research projects and for clinical purposes; results have been presented at conferences and in peer reviewed papers. The results indicate that MAIN is an appropriate assessment tool for evaluating children’s narrative competence, in production and comprehension from preschool age (5 years) to school age (8 years) in typical language development, bilingual development and language delay/disorders.
While the perilinguistic child is endowed with predispositions for the categorical perception of phonetic features, their adaptation to the native language results from a long evolution from the end of the first year of age up to the adolescence. This evolution entails both a better discrimination between phonological categories, a concomitant reduction of the discrimination between within-category variants, and a higher precision of perceptual boundaries between categories. The first objective of the present study was to assess the relative importance of these modifications by comparing the perceptual performances of a group of 11 children, aged from 8 to 11 years, with those of their mothers. Our second objective was to explore the functional implications of categorical perception by comparing the performances of a group of 8 deaf children, equipped with a cochlear implant, with normal-hearing chronological age controls. The results showed that the categorical boundary was slightly more precise and that categorical perception was consistently larger in adults vs. normal-hearing children. Those among the deaf children who were able to discriminate minimal distinctions between syllables displayed categorical perception performances equivalent to those of normal-hearing controls. In conclusion, the late effect of age on the categorical perception of speech seems to be anchored in a fairly mature phonological system, as evidenced the fairly high precision of categorical boundaries in pre-adolescents. These late developments have functional implications for speech perception in difficult conditions as suggested by the relationship between categorical perception and speech intelligibility in cochlear implant children.
The goal of our current project is to build a system that can learn to imitate a version of a spoken utterance using an articulatory speech synthesiser. The approach is informed and inspired by knowledge of early infant speech development. Thus we expect our system to reproduce and exploit the utility of infant behaviours such as listening, vocal play, babbling and word imitation. We expect our system to develop a relationship between the sound-making capabilities of its vocal tract and the phonetic/phonological structure of imitated utterances. At the heart of our approach is the learning of an inverse model that relates acoustic and motor representations of speech. The acoustic to auditory mappings uses an auditory filter bank and a self-organizing phase of learning. The inverse model from auditory to vocal tract control parameters is estimated using a babbling phase, in which the vocal tract is essentially driven in a random manner, much like the babbling phase of speech acquisition in infants. The complete system can be used to imitate simple utterances through a direct mapping from sound to control parameters. Our initial results show that this procedure works well for sounds generated by its own voice. Further work is needed to build a phonological control level and achieve better performance with real speech.