One of the fundamental questions in the field of language acquisition is a learnability problem, which considers how learners acquire certain aspects of language which are not directly provided in the input or whose referents are not readily observable. This dissertation investigates Japanese children's acquisition of various linguistic phenomena,…

We investigated the role of cue weighting, second language (L2) proficiency, and L2 daily exposure in L2 learning of suprasegmentals different from the first language (L1), using eye-tracking. Spanish monolinguals, English-Spanish learners, and Mandarin--Spanish learners saw a paroxytone and an oxytone verb (e.g., "FIRma-firMÓ"…

Due to the fact that both the subject and the topic can occupy the initial position of the sentence, English subject is always deemed as the UNMARKED TOPIC (Lambrecht, 1994), while the topic is not always the subject. In accordance with Rizzi's (1997) topicalization, both the subject and the topicalized constituents can be topics. Many other…

The study aims at unraveling the conceptual metaphor underlying the English verb of visual perception "see" in fiction writing. It has two research questions: 1) What are the conceptual metaphors underlying the linguistic expressions of the English verb of visual perception "see" in fiction writing and 2) What are the…

Configurations of support include those that exhibit Support-From-Below (cup "on" table), as well as those involving Mechanical Support (e.g., stamp "on" envelope, coat "on" hook). Mature language users show a "division of labor" in the encoding of support, frequently using basic locative expressions (BE…

We studied English-learning children's ability to learn the meanings of novel words from sentences containing truth-functional negation (Exp1) and to use the semantics of negation to inform word meaning (Exp2). In Exp1, 22-month-olds (n = 21) heard dialogues introducing a novel verb in either negative-transitive "("Mary didn't blick the…

Purpose: This study examined the frequency, direction, and structural characteristics of code-switching (CS) during narratives by Spanish-English bilingual children with and without developmental language disorder (DLD) to determine whether children with DLD exhibit unique features in their CS that may inform clinical decision-making. Method:…

Previous research has revealed that distributional information obtained from child-directed speech could be informative for children when they are learning grammatical categories. Frequent frames are distributional units proposed by Mintz and explored by researchers in many languages with different typologies. This study investigated two…

This study examined the effects of working memory (WM), structure, and salience on the processing of English relative clauses (RCs) and participial reduced relative clauses (PRRCs) by L1 Thai learners. Salience in this research is the phonological alterations required for irregular verbs to inflect into the past participial form. The study…

This guide draws on English-related errors from around 6000 papers written by non-native authors, 500 abstracts written by PhD students, and over 2000 hours of teaching researchers how to write and present research papers. This new edition has chapters on exploiting AI tools such as ChatGPT, Google Translate, and Reverso, for generating,…

In the present article, we report two eye-tracking experiments on how Chinese readers segment incremental words while reading Chinese. Incremental words are multicharacter words containing a subset of characters that constitute another word (referred to as the "embedded word"). For example, in a word containing three characters ABC…

To examine whether children's acquisition of perspective-marking language supports development in their ability to reason about mental states, we conducted a longitudinal study testing whether proficiency with complement clauses around age 3 explained variance in false-belief reasoning 6 months later. Forty-five English-speaking 2- and 3-year-olds…

The aim of this research is to investigate the effectiveness of teaching English grammar tense based on the concept of two English grammar tenses, past and present. The focus group is EFL/ESL learners of English. Prior research in the area of EFL/ESL teaching reveals that a number of teachers, linguists, and publishers of EFL/ESL texts claim that…

Measures of syntactic complexity such as mean length of T-unit have been common measures of language proficiency in studies of second language acquisition. Despite the ubiquity and usefulness of such structure-based measures, they could be complemented with measures based on usage-based theories, which focus on the development of not just…

This dissertation investigates when and how children figure out the force of modals, that is, when and how they learn that "can/might" express possibility, whereas must/have to express necessity. Learning modal force raises a logical "Subset Problem": given that necessity entails possibility, what prevents learners from…