Children with cochlear implants show deficits in identifying emotional intent of utterances without facial or body language cues. A known limitation to cochlear implants is the inability to accurately portray the fundamental frequency contour of speech which carries the majority of information needed to identify emotional intent. Without reliable access to the fundamental frequency, other methods of identifying vocal emotion, if identifiable, could be used to guide therapies for training children with cochlear implants to better identify vocal emotion. The current study analyzed recordings of adults speaking neutral sentences with a set array of emotions in a child-directed and adult-directed manner. The goal was to identify acoustic cues that contribute to emotion identification that may be enhanced in child-directed speech, but are also present in adult-directed speech. Results of this study showed that there were significant differences in the variation of the fundamental frequency, the variation of intensity, and the rate of speech among emotions and between intended audiences.

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Jusqu’à l’âge de 4 ans, les enfants francophones et anglophones se désignent et désignent leur interlocuteur à l’aide de formes différentes standard et non standard de référence à soi et à l’autre. Par le passé, des paramètres d’ordres sémantique, morphosyntaxique et pragmatique ont été étudiés, afin d’identifier les facteurs en jeu dans la production de ces différentes formes. Dans cette étude, nous analysons le rôle du langage adressé à l’enfant, par les parents. Des études précédentes ont en effet suggéré que les usages à la fois standard et non standard de référence à soi et à l’enfant-interlocuteur pouvaient jouer un rôle dans le processus d’acquisition des pronoms personnels (cf. Rabain-Jamin et Sabeau-Jouannet, 1989; Budwig, 1996; Kirjavainen et al., 2009; Morgenstern, 2011). Aucune étude systématique des énoncés des parents adressés à l’enfant n’a cependant été réalisée à ce jour. Pour apporter des éléments de réponse à cette question, nous analysons les données issues de 4 corpus de la base de données CHILDES. Ces corpus sont constitués d’enregistrements vidéo mensuels d’interactions libres dans 2 dyades francophones et 2 dyades anglophones. Partant des formes non standard de référence à soi et à l’interlocuteur produites par les enfants, nous questionnons d’une part l’influence de la fréquence de formes et de constructions similaires dans l’input, sur les productions des enfants. Observant d’autre part que les enfants emploient des formes différentes dans des contextes différents, nous nous demandons si ces associations forme-fonction sont présentes dans l’input ou si elles sont créées par l’enfant. Notre méthode d’analyse se situe donc au croisement des approches constructivistes et fonctionnalistes du processus d’acquisition du langage. Nos observations suggèrent que les productions des enfants reflètent à la fois les spécificités de l’input et leurs propres analyses du langage qui leur est adressé. Progressivement, l’input des enfants se fait plus important et plus diversifié et les enfants acquièrent de nouveaux outils pour exprimer leurs intentions communicatives. Ils sont alors en mesure de se désigner comme locuteur et de désigner leur interlocuteur en tant que tel, quelle que soit la situation. / Before the age of 4, English- and French-speaking children use standard and non standard forms to refer to themselves and their addressee. In the past, several semantic, morphosyntactic and pragmatic parameters have been investigated as potential factors responsible for these various forms. In the present study, we examine the role of parental speech on children’s productions. Previous research has in fact suggested that parents’ standard as well as non standard ways of referring to themselves and their child when addressing her, may play a role in the process of pronoun acquisition (cf. Rabain-Jamin and Sabeau-Jouannet, 1989; Budwig, 1996; Kirjavainen et al., 2009; Morgenstern, 2011). However, no systematic study of the speech parents address to their child has been conducted. To tackle this issue, we perform analyses on 4 corpora from the CHILDES database, composed of monthly video-recorded interactions in 2 French-speaking and 2 English-speaking dyads. Taking the children’s non standard ways of referring to themselves and their interlocutor as our starting point, we first question the influence of the frequency of similar forms and constructions observed in the input, on the children’s productions. Observing that the children use different forms in different contexts, we then ask whether these form-function associations can also be found in the input or whether children create them. Our method therefore combines constructivist approaches and functionalist approaches to the process of language acquisition. Our observations suggest that children’s productions reflect both the specificities of the surrounding input and their own linguistic and cognitive analyses. As they observe and use more and more language, acquire additional linguistic means of expressing their communicative intentions, and as the input and feedback they receive becomes diversified, children gradually come to refer to themselves as speakers and to their addressees as interlocutors.

Human language has two fundamental requirements: it must allow competent speakers to exchange messages efficiently, and it must be readily learned by children. Recent work has examined effects of language predictability on language production, with many researchers arguing that so-called “predictability effects” function towards the efficiency requirement. Specifically, recent work has found that talkers tend to reduce linguistic forms that are more probable more heavily. This dissertation proposes the “Predictability Bootstrapping Hypothesis” that predictability effects also make language more learnable. There is a great deal of evidence that the adult grammars have substantial statistical components. Since predictability effects result in heavier reduction for more probable words and hidden structure, they provide infants with direct cues to the statistical components of the grammars they are trying to learn. The corpus studies and computational modeling experiments in this dissertation show that predictability effects could be a substantial source of information to language-learning infants, focusing on the potential utility of phonetic reduction in terms of word duration for syntax acquisition. First, corpora of spontaneous adult-directed and child-directed speech (ADS and CDS, respectively) are compared to verify that predictability effects actually exist in CDS. While revealing some differences, mixed effects regressions on those corpora indicate that predictability effects in CDS are largely similar (in kind and magnitude) to predictability effects in ADS. This result indicates that predictability effects are available to infants, however useful they may be. Second, this dissertation builds probabilistic, unsupervised, and lexicalized models for learning about syntax from words and durational cues. One series of models is based on Hidden Markov Models and learns shallow constituency structure, while the other series is based on the Dependency Model with Valence and learns dependency structure. These models are then used to measure how useful durational cues are for syntax acquisition, and to what extent their utility in this task can be attributed to effects of syntactic predictability on word duration. As part of this investigation, these models are also used to explore the venerable “Prosodic Bootstrapping Hypothesis” that prosodic structure, which is cued in part by word duration, may be useful for syntax acquisition. The empirical evaluations of these models provide evidence that effects of syntactic predictability on word duration are easier to discover and exploit than effects of prosodic structure, and that even gold-standard annotations of prosodic structure provide at most a relatively small improvement in parsing performance over raw word duration. Taken together, this work indicates that predictability effects provide useful information about syntax to infants, showing that the Predictability Bootstrapping Hypothesis for syntax acquisition is computationally plausible and motivating future behavioural investigation. Additionally, as talkers consider the probability of many different aspects of linguistic structure when reducing according to predictability effects, this result also motivates investigation of Predictability Bootstrapping of other aspects of linguistic knowledge.

This diploma thesis deals with communication in kindergarten in selected communicative situations. The first part defines basic theoretical terms and, based on previous research, summarizes findings about pre-school education and mental and language development in pre- school children. The thesis also explains factors that influence language acquisition, child directed speech and pedagogical communication. The second part's main focus lies in describing communicative situations and in qualitative analysis of the acquired data - video recordings of selected communicative situation. The pocess of recording took place after previous agreement with two kindergartens. The recordings were transcribed according to the modified manual for the DIALOG database. The analysis is focused on the nature of the pedagogical communication in kindergarten. Our findings were compared to previous research results. Keywords communication, pedagogical communication, language acquisition, child directed speech, kindergarten

“Anaphora” is a label used for a referential expression that connects one entity (e.g. a pronoun) to another previously established entity (e.g. a proper name). The previously established entity is called an antecedent. The use of anaphora will, in this study, be referred to as referential behaviour. The study was based around audio and video recordings of free play between a Swedish parent and his/her child. 10 parents and their children were recorded. The referential behaviour of the parents was analysed. The sessions took place when the children were 3, 6, 9 and 12 months old. Recent studies indicate that speech directed at children during a child's first six months contains a larger amount of pronouns than the speech directed at children between 6 and 12 months of age. The purpose of the study was to examine if the decline of pronouns was visible in Swedish child- directed speech, and to see how different types of anaphora appeared in the same speech. Correlations between the visible changes of different types of referential expressions were also examined. A drop in the use of anaphoric pronoun with an explicit antecedent was found for the last two ages, which confirmed the study’s hypothesis. The results were also compared to each child’s vocabulary development.

Studies of Russian, Polish, and Lithuanian language learners converge on the finding that morphological features of nouns are first generalized to word clusters of high morpho-phonological similarities such as diminutives, that grammatical categorisation is are more easily applied to novel words that fall into these clusters. The present thesis explores whether the facilitating effect of diminutives on the acquisition of complex noun morphology can be extended to Serbian, a south Slavic language, morphologically similar to Russian and Polish. Specifically, the thesis explores the role of parameters responsible for the obtained diminutive advantage: high frequency of a particular cluster of words in child-directed speech (CDS) and morpho-phonological homogeneity within this cluster. A corpus analysis of the distribution of diminutives in Serbian CDS indicated a rather unexpected difference in frequency relative to Russian and Polish CDS, despite the high similarity of the diminutive derivation across these three Slavic languages. Out of the total number of nouns in Serbian CDS only 7% were diminutives, compared to 20-30% in Polish and 45% in Russian. Two experimental studies explored whether the low frequency of diminutives in Serbian CDS attenuates the diminutive advantage in morphology learning compared to Russian and Polish. In the first two experiments, Serbian children exhibited a strong diminutive advantage for both gender agreement and case marking in the same range as Russian children, indicating that morpho-phonological homogeneity within the cluster of diminutives may play as important a role as their frequency for grammatical categorisation of novel nouns. A third study investigated in more detail the effects of morpho-phonological homogeneity on the emergence of the diminutive advantage using a gender-agreement task with novel nouns in simplex and pseudo-diminutive form over four sessions with Serbian children. The results showed a pseudo-diminutive advantage for gender agreement by Session 2, suggesting that the categorisation of nouns into grammatical categories is based on morpho-phonological homogeneity of the word cluster, emerges relatively fast, and can occur despite the much lower frequency of diminutives in Serbian CDS. Finally, a series of neural network simulations designed to capture the pattern of results from the third experimental study was used to examine to what extent a simple associative learning mechanism, relying on morpho-phonological similarity of the noun endings, can explain the findings. The performance of three models, a whole-word feed-forward network, a Simple Recurrent Network (SRN) and a last-syllable feed-forward network, was compared to the experimental data. The superior fit of the SRN suggests that gender learning is based on a very fast sequential build-up of representations of the entire word, allowing the system to exploit the predictive power of word stems to anticipate regularised endings. Overall, the findings of this thesis contribute to our general understanding of mechanisms responsible for the acquisition of complex inflectional noun morphology in two ways. First, by extending experimental studies and neural network simulations to Serbian, the results underline the universality of the idea that noun morphology is learned and processed through a single-route associative mechanism based on the frequency and morpho-phonological structure of nouns. More specifically, the results from experimental studies and neural network simulations demonstrate that for diminutives, the low-level grammatical categorisation is based mainly on the morpho-phonological similarity of word endings, and can emerge after just a few exposures. And second, the neural network simulations suggest that during the process of categorisation of nouns into gender categories, learners rely not only on predictable information from the noun endings, but also on phonological regularities in the stems of nouns. Taken together, these findings contribute also to a better understanding of the facilitating role of CDS in morphology acquisition.

Cette recherche s’intéresse à l’usage de deux variables du français traditionnellement décrites comme phonologiques : la liaison et l’élision du schwa. Ces variables sont étudiées au cours d’interactions naturelles entre trois enfants et leurs parents respectifs. Plus précisément, l’objectif de cette thèse est de décrire les particularités du discours adressé à l’enfant (DAE) au niveau de l’usage des variables phonologiques et de mesurer leur impact sur l’émergence de la production de ces mêmes variables chez l’enfant. Après la présentation du cadre théorique d’analyse et de la méthodologie de recueil, de structuration et d’analyse des données, le travail de recherche s’organise en trois parties. La première étude basée sur corpus, descriptive, a deux principaux objectifs. Dans un premier temps, il s’agit de mesurer à quelle variation les jeunes enfants sont exposés au domicile familial. Ensuite, le but est de confronter les résultats des études précédentes sur l’acquisition de la liaison, principalement obtenus à partir de tâches expérimentales, à des données issues de corpus denses d’interactions parent-enfant. Cette étude a notamment permis de relever l’influence de facteurs liés à l’usage, comme la fréquence, sur l’emploi des variables phonologiques. La seconde étude se focalise sur les caractéristiques du DAE. Les résultats présentés démontrent notamment que l’usage des variables phonologiques est modulé en DAE, et ce essentiellement à un stade précoce. Cette modulation s’atténue ensuite au cours du développement linguistique des jeunes sujets. La dernière étude de ce travail de recherche permet de mettre en relation les productions enfantines et parentales. Il apparaît que le développement de la variation phonologique va dans le sens des hypothèses émises par les modèles basés sur l’usage : la variation phonologique est à un stade précoce mémorisée à l’intérieur de constructions spécifiques, particulièrement fréquentes et saillantes dans le DAE. Celles-ci vont ensuite s’abstraire et entrer en concurrence au cours du développement, ces deux phénomènes étant particulièrement sensibles aux facteurs d’usage, notamment la fréquence d’emploi des types et des formes linguistiques. / This study deals with the usage of two French linguistic variables liaison and elision, which are traditionally described as phonological variables. They are studied during natural interactions between three children and their parents. More precisely, the aim of this thesis is to describe the specificities of the child directed speech (CDS) concerning the usage of liaison and elision to measure their impact on the emergence of these phonological variables in the speech of the children. After the presentation of the theoretical context of the study (Usage-Based Models and Construction Grammar) and the methodology used to collect, structure, and analyse the data, the research is divided into three analysis sections. The aim of the first corpus based study, a descriptive one, is twofold. The first objective is to describe the variation to which children are exposed at home. A second objective is to compare the results of previous studies on liaison acquisition, obtained mainly from experimental tasks, with data extracted from dense corpora collected during natural interactions between the children and their parents. In particular, this study shows that usage factors, including the frequency of items, influence the production of phonological variables. The second study focuses on the specificities of CDS. The results show that the usage of phonological variables is modulated in CDS, essentially at an early stage of language acquisition. Then, this modulation attenuates during the child’s development. The aim of the third study is to connect parent’s productions and children’s productions. It appears that the results concerning the development of phonological variation are in step with the assumptions provided by the usage-based models: at an early stage, the variation is memorized into specific constructions, particularly salient and frequent in CDS. Then, these constructions are abstracted and enter into competition with each other during the course of language development. The children’s productions show that these two phenomena are especially sensitive to usage factors, including type and token frequency.

Äldreriktat tal avser kommunikationsanpassningar gentemot äldre liknande de som görs till små barn. Anpassningarna sker inom flera språkliga domäner och är en del av äldres kommunikativa miljö. Ämnet är relativt outforskat och få eller inga studier har gjorts i Sverige. Föreliggande studies syfte var att undersöka eventuell förekomst av äldreriktat tal, samt beskriva dess karakteristika då personal på olika typer av boenden för äldre samtalar med en äldre. Deltagare är fem personer som arbetar på olika former av boenden för äldre. Samtal mellan personal och äldre samt samtal mellan personal och en kollega spelades in och grovtranskriberades. Inspelningarna klipptes till filer utifrån varje analys syfte. Arbetet antog en datadriven ansats och data studerades utifrån tidigare forskning kring äldreriktat och barnriktat tal. I föreliggande studie påvisades att deltagande personal på boende för äldre, i varierande grad, anpassade sin kommunikation inom flera språkliga domäner. Anpassningarna förekom huvudsakligen inom den prosodiska domänen men förekom i viss utsträckning även inom den grammatiska. Anpassningar inom den pragmatiska domänen påvisades till viss del medan anpassningar inom den semantiska domänen ej förekom. Tendenser till talanpassningar förekom hos majoriteten av deltagarna. Följande tillägg av delaspekter till äldreriktat tal föreslås; upprepat användande av namn, mindre samtidigt tal och färre tvekfenomen. / The term elderspeak refers to the adjustments of communication towards elderly people which are similar to those made towards young children. The adjustments are made within several language domains, and are a part of the communicative environment of the elders. The subject is relatively uninvestigated, and few, if any, studies have been conducted on the subject in Sweden. Thus the aim of the present study was to investigate the possible occurrence of elderspeak, and to describe its characteristics. The present study is based upon five participants working at different forms of geriatric institutions. Conversations between a caregiver and a resident and conversations between a caregiver and a colleague were recorded and broadly transcribed. The recordings were cut into separate files according to the purpose of respective analysis. The study was carried out with a data-driven perspective and previously established aspects of elderspeak and child directed speech was searched for. The present study established that caregivers to a varying extent adjusted their communication within several language domains. The adjustments mainly took place within the prosodic domain but they also took place within the grammatical domain. Adjustments within the pragmatic domain were found to some extent, but no adjustments within the semantic domain were found. Tendencies to adjustments of the speech were present in the majority of the participants. The present study suggests the following additions to the aspects of the elderspeak phenomenon; frequent use of name, less hesitation phenomena and less frequent simultaneous speech.

Child-directed speech (CDS) differs from adult-directed speech (ADS) in several respects whose possible facilitating effects for language acquisition are still being studied. One such difference concerns articulation rate --- the number of linguistic units by the number of time units, excluding pauses --- which has been shown to be generally lower than in ADS. However, while it is well-established that ADS exhibits an inverse relation between articulation rate and information-theoretic surprisal --- the amount of information encoded in a linguistic unit --- this measure has been conspicuously absent in the study of articulation rate in CDS. Another issue is if the lower articulation rate in CDS is stable across utterances or an effect of local variation, such as final lengthening. The aim of this work is to arrive at a more comprehensive model of articulation rate in CDS by including surprisal and final lengthening. In particular, one-word utterances were studied, also in relation to word-length effects (the phenomenon that longer words generally have a higher articulation rate). To this end, a methodology for large-scale automatic phoneme-alignment was developed, which was applied to two longitudinal corpora of Swedish CDS. It was investigated i) how articulation rate in CDS varied with respect to child age, ii) whether there was a negative relation between articulation rate and surprisal in CDS, and iii) to what extent articulation rate was lower in CDS than in ADS. The results showed i) a weak positive effectof child age on articulation rate, ii) a negative relation between articulation rate and surprisal, and iii) that there was a lower articulation rate in CDS but that the difference could almost exclusively be attributed to one-word utterances and final lengthening. In other words, adults seem to adapt how fast they speak to their children's age, speaking faster to children is correlated with a reduced amount of information, and the difference in articulation rate between CDS and ADS is most prominent in isolated words and final lengthening. More generally, the results suggest that CDS is well-suited for word segmentation, since lower articulation rate in one-word utterances provides an additional cue.