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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.
This paper shows the early development of the first approximately 50 verbs found in the recorded speech production of one Croatian girl. The aim is to analyse and interpret the child's verb development in terms of the distinction of a pre- and a protomorphological phase before modularised morphology in language acquisition (Dressler & Karpf 1995). Furthermore, focus will be laid on the emergence of first verb paradigms.
Our results indicate some differences in the use of aspect between French and Croatian speaking children. In Croatian language children always manage to keep the appropriate aspect, unlike French children. However, the imperfective aspect seems to be better acquired in French children than the perfective aspect. The perfective aspect, the marked form both in French as well as in Croatian, is related to the lexical meaning of the verbs. The acquisition of the Aktionsart in both languages seems to be more a matter of semantics than of morphology. Furthermore, our data suggest the existence of a specific developmental trend in the use of Aktionsart (intensive, iterative and inchoative), which is similar for children speaking Slavic and Romanic languages.
This paper reports results from a series of experiments that investigated whether semantic and/or syntactic complexity influences young Dutch children’s production of past tense forms. The constructions used in the three experiments were (i) simple sentences (the Simple Sentence Experiment), (ii) complex sentences with CP complements (the Complement Clause Experiment) and (iii) complex sentences with relative clauses (the Relative Clause Experiment). The stimuli involved both atelic and telic predicates. The goal of this paper is to address the following questions.
Q1. Does semantic complexity regarding temporal anchoring influence the types of errors that children make in the experiments? For example, do children make certain types of errors when a past tense has to be anchored to the Utterance Time (UT), as compared to when it has to be anchored to the matrix topic time (TT)?
Q2. Do different syntactic positions influence children’s performance on past-tense production? Do children perform better in the Simple Sentence Experiment compared to complex sentences involving two finite clauses (the Complement Clause Experiment and the Relative Clause Experiment)? In complex sentence trials, do children perform differently when the CPs are complements vs. when the CPs are adjunct clauses? (Lebeaux 1990, 2000)
Q3. Do Dutch children make more errors with certain types of predicate (such as atelic predicates)? Alternatively, do children produce a certain type of error with a certain type of predicates (such as producing a perfect aspect with punctual predicates)? Bronckart and Sinclair (1973), for example, found that until the age of 6, French children showed a tendency to use passé composé with perfective events and simple present with imperfective events; we will investigate whether or not the equivalent of this is observed in Dutch.
The comprehension and production of single words involve a variety of processing stages. Which stages need to be accessed differs depending on whether objects (pictures in an experimental environment) or words are supposed to be named. Naming tasks are often employed in psycholinguistic studies in order to provide an insight into the function of mental processes during word production. Differences in naming latencies and naming accuracy between words suggest that the retrieval of some lexical items is easier or more difficult in contrast to others. The relative ease of word retrieval has been found to be strongly influenced by properties of these words, such as familiarity and written or spoken frequency.
Exploring which variables affect naming speed and accuracy will allow gaining more information about the storage and processing of words in general. If a variable has a discernable effect on a specific experimental task, the localization of this effect is of interest for psycholinguistic research. This is because finding the locus of the effect can help specify models of speech production with respect to what processes occur at which stage of lexical retrieval. Additionally, identifying which variables influence language processing is inevitable in order to control for these variables when necessary. Otherwise variance in naming latencies could not be explained by the variable that was to be tested because other, uncontrolled variables could have altered the results.
In dieser Arbeit untersuchen wir, welche nicht-satzwertigen Einheiten 2- bis 3-jährige Kinder ins Nachfeld stellen und aus welchen Gründen sie dies tun. Kindliche Äußerungen können ab der Phase der 'item'-basierten Konstruktionen, in der sie die Satzklammer erwerben, mit dem topologischen Feldermodell analysiert werden. Wir argumentieren dafür, dass Kinder zunächst ein vorläufiges Nachfeld entwickeln, welches sich hinter infiniten Verben oder Verbpartikeln befindet. Am häufigsten finden sich Adverb-, Präpositional- und Nominalphrasen im Nachfeld. Adverbien zeigen Verfestigungstendenzen, sodass wir diese als Konstruktionen beschreiben mit der Funktion, die Äußerung im Kontext zu verorten und/oder dieser Nachdruck zu verleihen. Präpositional- und Nominalphrasen werden aus Gründen der Zeitlichkeit bzw. nicht ausreichender Planung ins Nachfeld gestellt. Die Häufigkeit der Nominalphrasen im Nachfeld nimmt mit zunehmendem Alter ab.
The present study is concerned with Single Clitics, as weil as with Clitic Doubling and Clitic Left Dislocation constructions and will test the Uniformity Hypothesis (Sportiehe 1992), according to which all three constructions involve the same underlying structure. It will be shown that:
- acquisition data pose a problem for the Uniformity Hypothesis (Sportiche 1992) and support rather the idea that Single Clitic, Clitic Doubling and Clitic Left Dislocation constructions do not involve the same underlying structure,
- omission of definite articles in Clitic Doubling and Clitic Left Dislocation constructions parallels omission of definite articles in simple DPs,
- selective omission of some types of Determiners, i.e. definite articles and use of another type of Determiners, i.e. clitic pronouns, can be explained in terms of the different feature specification of words belonging to the category D and the different status of clitics vs. definite articles.
The ultimate goal of the study is to examine the acquisition of intensifiers in English and German. In this paper an overview of the first results regarding four L1 English-speaking children will be given. Contrary to previous claims in the literature (e.g. Thomas 1990), it will be argued that intensifiers are used by children in early phases of language acquisition. Intensifiers play an important role in early phases of language acquisition since they can be used to express the wish either to be included or excluded in a certain action and thus contribute to structuring a central aspect of the child's discourse.
The article deals with the analysis of the development of aspectuality at the early stages of the acquisition of Russian. Data from seven children are investigated for this purpose. It is claimed that the category of aspectuality, being the property of the whole utterance, can be expressed at the early stages of language acquisition even before the verb itself occurs. During this period some children mark the basic aspectual opposition "process-result" by the linguistic devices at their disposal, namely by various uses of sound imitations or onomatopoetics. Onomatopoetics, when used once, can be said to be the predecessors of perfective verbs, while reduplicative use of onomatopoetics seems to correspond to the imperfective aspect. The paper presents an analysis of the early verb lexicons of six children. Among their 24 earliest verbs both aspects are represented. As revealed by the analysis, aspect (and Aktionsart) clusters with tense in a specific way: imperfective verbs are mainly used in the present while perfectives are used mostly in the past.
Obwohl wir bereits nachweisen konnten, dass Exklusionen nicht sprachlich verursacht sind, können sie doch experimentell durch sprachliche Reize, nämlich durch eine spezifische Benennung von Exemplaren ausgelöst werden. Aus diesem Grund soll hier der sprachliche Einfluß auf das Auftreten von Exklusionen und Reduktionen detaillierter untersucht werden. Dabei interessiert vor allem, welche sprachlichen Reize die Art Verarbeitung befördern, die auf der Verhaltensebene als Exklusion oder Reduktion in Erscheinung tritt.
The study presents a first investigation of two different processes in the L1-acquisition of German: The acquisition of definite pronominal forms and the occurence of finite verbs. The aim of the study is to find out if there are inherent relations between both processes. Inherent relations are understood as developmental relations based on the structural properties which demand a correlated emergence of the finite verb and definite pronominal forms.
Defined as a general inner-linguistic function, modality pervades language and there can thus be no strictly nonmodal predicative expressions. We shall, however, in what follows, keep to grammatical tradition and exclude declarative and interrogative sentences in the indicative mood from consideration. Although a thorough study of the development of modal negation should prove most rewarding, we must renounce such an attempt out of space limits. […] [W]e shall be concerned with the formal linguistic devices employed by the child for expressing modality in various languages and the functions these serve, i.e. how they are used. Only by the conjoint study of form and function can one hope to arrive at a fair understanding of how the modalizing function develops in the ontogenesis of language.
Studies of syntax in first language acquisition have so far concentrated on the propositional side of the sentence, i.e. on the occurrence and interplay of semantic roles like agent, benefactive, objective, etc. and their syntactic expression. The modality constituent, however, has received little attention in the study of child language. This may be due in part to the impetus more recent research in this field has received from studies of the acquisition of English, a language with poor verb morphology as compared to synthetic languages. The research to be presented in this paper is concerned with an early stage of the acquisition of Modern Greek as a first language, a language with a particularly rich verb morphology. Since modality, aspect, and tense are obligatorily marked on the main verb in Mod. Greek, this language offers an excellent opportunity for studying the development of these fundamental categories of verbal grammar at an earlier stage than in more analytic languages. [...] As this paper is concerned with the semantic categories of verbal grammar mentioned above as weIl as with their formal expression, only utterances containing a verb will be considered. For reasons of space we shall further limit ourselves to those utterances containing a main verb. Such utterances divide into two classes, modal and non-modal. [...] In spite of Calbert's claim (Calbert 1975) that there are no strictly non-modal expressions, affirmative and negative statements as well as questions not containing a modal verb will be considered as non-modal. As will be shown below, modal and non-modal expressions are formally differentiated at the stage of language acquisition studied.
Bestimmte seit den sechziger Jahren zur Analyse früher kindlicher Äußerungen benutzte Beschreibungsmodelle unterschätzen die sprachliche Kompetenz des Kindes, indem sie die Struktur seiner Äußerungen auf Distributionsphänomene der Oberflächenstruktur reduzieren, andere Modelle überschätzen diese Kompetenz, indem sie kindlichen Äußerungen mehr sprachliche Information zuschreiben, als sie enthalten. Wenn außersprachliche Information auf systematische Art und Weise in die Untersuchung der sprachlichen Kommunikation zwischen Kind und Erwachsenem einbezogen wird, findet einerseits die Tatsache eine Erklärung, daß diese Kommunikation in so erstaunlichem Maße erfolgreich ist, andererseits erlaubt diese Beschreibungsweise es aber, frühe kindliche Äußerungen als sprachlich so undeterminiert darzustellen, wie sie sind.
The acquisition of Greek
(1995)
Studie zum Erwerb des Neugriechischen