In this dissertation, I examine how fingerspelled words and core signs in American Sign Language (ASL) reduce as they are repeated. This investigation is motivated by theories of language production that posit that reduction may be shaped not only by reducing articulatory effort, but also by accommodation to an interlocutor's understanding of the…

This article follows Johnson and Liddell (2011a, 2011b, 2011c, 2012) and Liddell and Johnson (2019), which introduce the concepts of sequentiality and contrast, a segmental framework consisting of postures and trans-forms, and features describing the configuration of the fingers and of the thumb. This article further develops that theory of…

The lack of diversity in the language sciences has increasingly been criticized as it holds the potential for producing flawed theories. Research on (i) geographically diverse language communities and (ii) on sign languages is necessary to corroborate, sharpen, and extend existing theories. This study contributes a case study of adapting a…

The visual-manual modality of sign languages renders them a unique test case for language acquisition and processing theories. In this commentary the authors describe evidence from signed languages, and ask whether it is consistent with Ambridge's proposal. The evidence includes recent research on collocations in American Sign Language that reveal…

Second language acquisition (SLA) research offers valuable insight on how languages are learned and how they coexist and influence each other. Sign language learners offer unique perspectives on SLA, allowing researchers to test theories that are otherwise constrained by access to only one modality. Current literature on sign language learning…

Several studies have explored the use of iconic gestures to improve the learning of foreign vocabulary. In this quest, words for abstract concepts have been largely neglected, under the assumption that abstract concepts have poor or non-existent sensory-motor representations. Yet, the Conceptual Metaphor Theory suggests that they are grounded on…

In this article, we provide an overview of the last twenty years of research on Indigenous sign languages, deaf community sign languages, co-speech gesture, and multimodal communication in the Australian context. From a global perspective, research on sign languages and on the gestures that normally accompany speech has been used as the basis for…

Conceptual metaphor theory (CMT) proposes that there is a large system of conceptual metaphors in our cognition known as event-structure metaphors (ESMs). Through ESMs, we understand the conceptual domains of actions, causes, changes, states, purposes, and so forth in terms of the aspects of the domain of motion in space. ESMs are largely…

This investigation aimed to explore the feasibility of implementing the strategic and interactive signing instruction (SISI) framework and its potential to enhance the signed composition skills of four deaf students in a first/second-grade classroom. SISI was adapted from the existing strategic and interactive writing instruction (SIWI) framework…

A sociolinguistic style consists of a set of linguistic resources that carry specific meaning within a social context (Campbell-Kibler 2011). One such resource is the use of phonetic variants that do not change the denotative meaning of a word, but are different enough to be recognized as unique. This type of socially constrained phonetic…

Kenyan Sign Language (KSL) is a thriving national sign language used by tens of thousands of signers in Kenya, and which emerged out of two deaf schools in western Kenya in the early 1960s. In this thesis, I provide a thorough description and analysis of the basic phonological components of the KSL lexicon used in the southwestern region of Kenya…

Developmental psychology plays a central role in shaping evidence-based best practices for prelingually deaf children. The Auditory Scaffolding Hypothesis (Conway et al., 2009) asserts that a lack of auditory stimulation in deaf children leads to impoverished implicit sequence learning abilities, measured via an artificial grammar learning (AGL)…

The infant brain may be predisposed to identify perceptually salient cues that are common to both signed and spoken languages. Recent theory based on spoken languages has advanced sonority as one of these potential language acquisition cues. Using a preferential looking paradigm with an infrared eye tracker, we explored visual attention of hearing…

A small group of interpreters was interviewed with regard to their view of learning ASL and becoming bicultural. A model of identity was then postulated based on Hegel's dialectic (Wheat 2012) of thesis (presuppositions, stereotypes, or theories about ASL and the Deaf community), antithesis (conflicting experiences), and synthesis (new…

The primary goal of this dissertation is to investigate the relationship between Universal Grammar and the properties that Universal Grammar constrains, by investigating how language is created/acquired. The framework proposed in this dissertation provides us with tools for predicting what will and will not appear in linguistic systems of…