The goal of this dissertation is to better understand the targets of vowels in speech production. Three experiments investigate vowel production in non-native speech, probing how new vowel categories, and thus targets, are formed. Three research questions are addressed: (1) Do vowels have articulatory targets (as predicted by Browman &…

Background: Proficient speakers of a language often accommodate less proficient speakers during conversation to facilitate comprehension, but information about factors such as personality and language experience that may shape how speakers perceive accommodation is limited. Purpose: We developed an online questionnaire to clarify the use of speech…

Studies have shown that iconicity can provide a benefit to non-signers during the learning of single signs, but other aspects of signed messages that might also be beneficial have received less attention. In particular, do other features of signed languages help support comprehension of a message during the process of language learning? The…

Recent evidence suggests that deaf children with CIs exposed to nonnative sign language from hearing parents can attain age-appropriate vocabularies in both sign and spoken language. It remains to be explored whether deaf children with CIs who are exposed to early nonnative sign language, but only up to implantation, also benefit from this input…

This research investigates the enhancement of English public speaking skills among Thai EFL (English as a Foreign Language) students through imitating TED Talks videos. By applying Vygotsky's Zone of Proximal Development (ZPD) and Krashen's Input Hypothesis, the study integrates authentic materials for effective learning. A mixed methods approach,…

This article focuses on designing and evaluating conversation practice in a second language (L2) with a robot that employs human spoken and non-verbal interaction strategies. Based on an analysis of previous work and semi-structured interviews with L2 learners and teachers, recommendations for robot-led conversation practice for adult learners at…

This paper critically analyses the meaning and use of translanguaging as an inclusive pedagogical strategy in the context of a bilingual deaf education classroom where there are asymmetrical sensorial experiences of being deaf and being hearing, and different access to 'codified' (either speech or sign-language) resources. The pedagogical…

Since recognition technology has been widely used to support learners' language learning, it is necessary to have a framework that can support the implementation of anything-to-text recognition technology, such as speech-to-text recognition, image-to-text recognition, body movement-to-text recognition, emotion-to-text recognition, and…

Successful face-to-face communication involves multiple channels, notably hand gestures in addition to speech for spoken language, and mouth patterns in addition to manual signs for sign language. In four experiments, we assess the extent to which comprehenders of British Sign Language (BSL) and English rely, respectively, on cues from the hands…

In recent years, research in multimodality has established the benefits of using multiple semiotic modes like image, sound, and text in digital second language (L2) communication. However, researchers have yet to investigate how L2 learners make meaning through embodied modes--or gestures and facial expressions. Grounded in the social semiotic…

This article reviews research findings involving visual input in speech processing in the form of facial cues and co-speech gestures for second-language (L2) learners, and provides pedagogical implications for the teaching of listening and speaking. It traces the foundations of auditory-visual speech research and explores the role of a speaker's…

Nonverbal behavior is essential in human interaction (Gullberg, de Bot, & Volterra, 2008; McNeill, 1992, 2005). For second language speakers, nonverbal features can be helpful for successful and efficient communication (e.g., Dahl & Ludvigsen, 2014). However, due to the complexity of nonverbal features, language testing institutions have…

The effects of question or task complexity on second language speaking have traditionally been investigated using complexity, accuracy, and fluency measures. Response processes in speaking tests, however, may manifest in other ways, such as through nonverbal behavior. Eye behavior, in the form of averted gaze or blinking frequency, has been found…

Monolingual children identify referents uniquely in gesture before they do so with words, and parents translate these gestures into words. Children benefit from these translations, acquiring the words that their parents translated earlier than the ones that are not translated. Are bilingual children as likely as monolingual children to identify…

This study aimed to explore the relationship between Turkish English as a Foreign Language (EFL) learners' self-efficacy level and their opinion regarding their use of compensatory strategies (CSs). The study further searched into the most and the least frequently used CSs by Turkish EFL learners. The participants of the study were fifty…