This study explores the developmental change of mother-child interactions in order to investigate which aspects of maternal behavior affect children's speech production. To this end, the interactions between 79 German-speaking mothers and their two- or five-year-old children were observed at two time points (12 months apart) and in two interactive…

A well-known challenge for language learners is that the input is typically produced by a variety of speakers, each with distinct vocal characteristics (Liberman, Harris, Hoffman, & Griffith, 1957). Accordingly, many studies have indicated that talker variability leads to processing costs for learners across the lifespan (Jusczyk & Pisoni,…

The current study used growth curve analysis to study the role of input during the acquisition of the English causal connective "because" and its German counterpart "weil." The corpora of five German and five English children and their adult caretakers (age range 0;10-4;3) were analyzed for the amount as well as for the type of…

Understanding the place of consciousness in second language acquisition (SLA) is crucial for an understanding of how acquisition occurs. Considerable work has been done on this topic, but nearly all of it assumes a highly non-modular view, according to which language and its development is "nothing special". As this assumption runs…

Young children are able to categorize animals on the basis of unobservable features such as shared biological properties (e.g., bones). For the most part, children learn about these properties through explicit verbalizations from others. The present study examined how such input impacts children's learning about the properties of categories. In a…

In this article, we challenge the notion that aptitude--operationalized as grammatical sensitivity as measured by the Words in Sentences section of the Modern Language Aptitude Test--is central to adult second language (L2) acquisition. We present the findings of a study on the acquisition of two properties of Japanese, head-final word order and…

This dissertation investigates the knowledge of English non-finite complement constructions by near-native L1 Spanish/L2 English learners. In particular, this study concerns Object Control, Raising to Object, and "for"-type constructions. Although the three constructions look identical on the surface, they are in fact distinct syntactic…

This study employs the Specificity Principle to examine the relative impacts of external (input quantity at home and at school, number of books and reading frequency at home, teachers' degree and experience, language usage, socioeconomic status) and internal factors (children's working memory, nonverbal intelligence, learning-related…

Speaking is an essential and fundamental aspect of human Language. By acquiring and learning language, individuals can speak and conversate with each other, transmit information and interact. However, in practical aspects, it is somehow, difficult for second and foreign language learners to practice English in their day-to-day life. Despite being…

Languages differ in how they package the components of an event into words to form sentences. For example, while some languages typically encode the manner of motion in the verb (e.g., running), others more often use verbs that encode the path (e.g., ascending). Prior research has demonstrated that children and adults have lexicalization biases;…

Accurate recovery of predicate-argument dependencies is vital for interpretation tasks like information extraction and question answering, and unbounded dependencies may account for a significant portion of the dependencies in any given text. This thesis describes a Generalized Categorial Grammar (GCG) which, like other categorial grammars,…

We compare the predictions of two different accounts of first language acquisition by investigating the relative contributions of abstract syntax and input frequency to the elicited production of main and embedded questions by 36 monolingual English-speaking toddlers aged 3;00 to 5;11. In particular, we investigate whether children's accuracy…

Studies of learner-learner interactions have reported varying degrees of pronunciation-focused discourse, ranging from 1% (Bowles, Toth, & Adams, 2014) to 40% (Bueno-Alastuey, 2013). Including first language (L1) background, modality, and task as variables, this study investigates the role of pronunciation in learner-learner interactions.…

This dissertation explores Spanish nominal plural formation from a morphophonological perspective. The primary objective is to better understand heritage bilinguals' (HBs') phonological categorization of the morphological element of number in their heritage language. This is done by way of picture-naming elicitation tasks of consonant-final nouns…

Research Findings: This study reports initial descriptive and validity results of a new early childhood classroom observation measure, the Classroom Language Environment Observation Scales (CLEOS), designed to capture teachers' use of both implicit language supports (e.g., incidental scaffolding and shared reading) and more explicit language…