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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.
Die vorliegende Arbeit befasst sich mit dem muttersprachlich Erwerb (L1) des Genus im Deutschen. Im Zentrum der Untersuchung steht die Frage, wie ein Kind aus dem ihm angebotenen Sprachinformationen das komplexe System der Genusmarkierung erwirbt. Sie wird anhand von Daten aus einer Langzeitstudie eines monolingual aufwachsenden deutschen Kindes erörtert. Der Rahmen dieser Arbeit erforderte bei ihrem Aufbau gewisse Einschränkungen. So habe ich mich in der Auswertung der Erwerbsdaten auf den bestimmten Artikel als Genusanzeiger konzentriert. Als Artikel zeichnet er sich gegenüber den ebenfalls genusabhängigen Adjektiven dadurch aus, dass er eine meist obligatorische Konstituente einer Nominalphrase (NP) mit einem Substantiv darstellt. Der bestimmte Artikel wiederum ist einerseits der frequenteste unter den Artikelwörtern und weist andererseits das differenzierteste Formeninventar auf, wobei er als einziger Artikel im Nominativ alle drei Genera differenziert. Auch habe ich mich entschlossen, auf eine Gegenüberstellung und Diskussion verschiedener Spracherwerbstheorien zu verzichten und stattdessen ausführlicher auf die Aspekte, die im Erwerbsprozess selbst und somit für die Datenanalyse relevant sind, einzugehen. Dabei sollen unterschiedliche Ansätze berücksichtigt sowie die aktuelle Forschungslage dargestellt werden.
Ziel der Untersuchung ist der Erwerb von aspektuellen Markierungen im Bulgarischen. Da Bulgarisch über ein nominales Artikelsystem und über eine verbale Aspektkategorie verfügt, liefert es eine ausgezeichnete Gelegenheit, die Verwendung von nominalen und verbalen Aspektmarkierungen im frühen Spracherwerb aufzuzeigen. Der Artikel präsentiert die Daten aus einer Langzeitstudie und einer experimentellen Testreihe. Die Ergebnisse belegen, dass die bulgarischen Kinder am Anfang vom Prinzip der Aspektkomposition Gebrauch machen. Aspektuell unmarkierte Verben werden durch definite Objekte ergänzt, um begrenzte Handlungen auszudrücken. Der schnelle Erwerb der Aspektmorphologie verschiebt die Gewichtung im Satz von den nominalen zu den verbalen Aspektmarkern. Im Alter von zweieinhalb Jahren beherrschen die bulgarischen Kinder die sprachspezifische syntaktische Anforderung, dass perfektiv markierte Prädikate quantitativ definite Argumente verlangen.
We argue that Malagasy (and related W. Austronesian languages!) has a positive setting for a macro-parameter RICH VOICE MORPHOLOGY which builds complex predicates that code the theta role of their argument: S = [[PreN(6) + (X)] + DP]. Manifestations of this parameter are: (1) Case and theta role are assigned in situ in nuclear clauses with no movement or co-indexing to a topic position. (2) Relative Clauses (and other "extraction" structures) satisfy the "Subjects Only" constraint, again with no movement or indexing. (3) UTAH is freely violated, as theta role assignment derives from compositional semantic interpretation. Predicates resemble lexical Ns in assigning case directly to arguments without using Prepositions and in combining directly with Dets to form DPs that include tense and negation (Keenan 1995, 2000). The major Predicate-Argument type is modeled on the Noun+Possessor one, not the Verb+Object one.
The purpose of this research was to trace the developmental steps in the acquisition of aspectual oppositions in Russian and to examine the validity of the 'aspect before tense' hypothesis for L1-speaking children. Imperfective/perfective verbs and their inflections, as well as aspectual pairs, were analysed in the first five months of verb production (and the respective months in the input) in three children. Additionally, the first four months of verb production were investigated in one boy with less data. Verb forms marked for the past and for the present occur simultaneously in all children. These early forms relate to 'here and now' situations: verbs marked for the past denote 'resultative' events that are perceived by the children as occurring during the speech time or immediately before it, while verbs marked for the present typically denote on-going events. Thus, with early tense oppositions (or tense morphology) children mark aspectual contrasts in the moment of speech: evidence in favour of the 'aspect before tense' hypothesis.
A strong preference in using the perfective aspect for the past and the imperfective aspect for the present events has been found in both adults and children. Further, only very few aspectual pairs were documented within the analysed period (from the onset of verb production to the period when children produce rule-driven inflectional forms). The productive use of the finite forms of perfective and imperfective verbs doesn't concord with the ability of the productive use of the contrastive forms of one lemma. Data suggest that children (start to) learn aspectual forms in an item-based manner. The acquisition of aspectual oppositions (aspectual pairs) is lexically dependent and is guided by the contextual 'thesaurus'. Aspectual pairs are learned in a peace-meal way during much longer, than observed for this article, period of time. Generally, aspect is not learned as a rule, also because there are no (uniform) rules of forming of aspectual pairs, but as the 'satellite' of the inherent lexical meaning of verbs of diverse Aktionsarten.
The issues addressed here are relevant for other Slavic languages, exhibiting the morphological category of aspect.
Der Beitrag referiert Ergebnisse eines mit Erwachsenen durchgeführten Experiments zum Verständnis des bestimmten Artikels. Das Testmaterial entstammt einem für Kinder konzipierten Blickpräferenzexperiment. Die Durchführung des Tests mit Erwachsenen diente als Kontrolle der Verwendbarkeit der Materialien und der Überprüfung folgender Hypothese: Die referentielle Grundfunktion des Artikels besteht im Verweis auf begrenzte Ganze bzw. einen bestimmten (=begrenzten) Umfang einer Entität. Der interessante Aspekt des Experiments war, dass die Entscheidung zwischen [+begrenzt] vs. [-begrenzt] innerhalb einer pluralischen Kondition fallen musste, die Begrenztheitslesart wurde also nicht durch einzahlig auftretende zählbare Objekte erzeugt. Die Ergebnisse zeigen, dass die pluralische Kondition sich auf das Antwortverhalten der Probanden auswirkte. Probanden mit durchschnittlich längerer Reaktionszeit entscheiden sich anders als Probanden mit vergleichsweise kurzer Reaktionszeit. Während von der Gruppe mit spontanerem Entscheidungsverhalten die Hypothese im Hinblick auf den Artikel bestätigt wurde, scheint sich die Gruppe mit höheren Reaktionszeiten für das prototypischere Bild innerhalb der Pluralkondition zu entscheiden.
The study examines the hypotheses that the acquisition of the finite verb is an indispensable and linking constituent of the development of SVO utterances. Four apparently separate or at least separable processes are analysed over 6 months in one Russian and one German child: a) the emergence of verbs in the child’s utterances, b) the occurrence of correctly inflected (finite) verb forms, c) the development of multi-component utterances containing a verb, and c) the emergence of (potential) subjects and objects. Russian and German exhibit rich verb morphology, and in both languages finiteness is strongly correlated with inflectional categories like person, number and tense. With both children we find a correlation in the temporal order of these four processes and – what is more relevant for our study – a dependency of a certain development on the utterance level on the emergence of finite verbs. Further, our investigation shows that language-specific development comes in to play already when children start to acquire verb inflection and becomes more contrastive when we observe the onset of the production of the SVO utterances.
In the following, we will discuss the acquisition of plural forms in German from the unified perspective of the two, in our opinion compatible, approaches, on the basis of a longitudinal data sample of eight children. There are at least six recordings of each child, all of whom are girls. Together, the data cover the acquisition period from 1;11 to 2;10. One may thus anticipate that the data sample under investigation reflects the transition from purely lexical memorization to the acquisition of regularities or patterns.
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.
This paper deals with the emergence of verb morphology in one German child up to the time mini-paradigms occur in the data. I will focus on the role of protomorphology as a transitional stage between rote learning and the productive use of morphological distinctions.
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.
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.
Introduction
(2000)
In this paper the first results concerning the development of early verb morphology in an L1-English speaking child are presented. Adopting the framework of morphological development of Dressler (Dressler, this volume) the data of a girl from the CHILDES database, Nina of the Suppes corpus, is analysed with regard to the emergence of early verbal categories (e.g. number and person) and their appearance in a first mini-paradigm. In the sessions analysed so far the child Nina has reached an age of 2;2 when the first mini-paradigm emerges.
This paper deals with early verb development (e.g., person, tense) until the emergence of verb-paradigms in two French-speaking children.
I will show the parallelism between the two children in the gradual building of paradigms, despite considerable differences in the rate of development. Individual differences on the other hand will bring me to reconsider the broad category of premorphological rote-learnt forms which already displays some patterning in one of the children's data.
This paper studies the acquisition process of Spanish verbal morphology in a monolingual child. The study focuses on the period of the first 50 verb lemmas. This covers the period from age 1;7 till 1;10.
The data shows that the verb acquisition process of this Spanish child follows three main stages:
1. A lexical stage in which verbs are only acquired as a lexical element.
2. A syntactic stage in which the verb, still contemplated as a non-split word, becomes the main element in the development of thematic and semantic relations.
3. A morphological stage in which verb suffixes begin to be analysed separately. At this stage, the relationship between form and meaning starts and the functional categories linked to the verb (tense, aspect, agreement, mood... ) begin to be acquired. Just at this moment, the first miniparadigms appear, which suggests that the acquisition process of verb morphology has started.
The first two stages are premorphological and cover in our child the period till 1;9. In the last stage, which begins at 1;10, the child enters the protomorphological stage.