Background: Children with Down syndrome have speech and language difficulties that are disproportionate to their overall intellectual ability and relative strengths in the use of gesture. Shared book reading between parents and their children provides an effective context in which language development can be facilitated. However, children with…

Researchers examining the structure of questions in signed languages, often using elicited data from informants, have proposed that there are specific manual and nonmanual actions produced by signers to indicate different question types (e.g., Zeshan 2004), for example, raised eyebrows for polar questions. In the current study, we add to this body…

Purpose: Key word signing (KWS) entails using manual signs to support the natural speech of individuals with normal hearing and who have communication difficulties. While manual signs from the local sign language may be used for this purpose, some KWS systems have opted for a distinct KWS lexicon. Distinct KWS lexicon typically aims for higher…

Representations of the fingers are embodied in our cognition and influence performance in enumeration tasks. Among deaf signers, the fingers also serve as a tool for communication in sign language. Previous studies in normal hearing (NH) participants showed effects of embodiment (i.e., embodied numerosity) on tactile enumeration using the fingers…

This paper is the third in a series concerned with the level of access provided to deaf and hard of hearing children who rely on interpreters to access classroom communication. The first two papers focused on the accuracy and intelligibility of educational interpreters who use Cued Speech (CS); this study examines the accuracy of those who use…

Establishing evidence- and research-based practices relies upon research synthesis of individual studies in reviews and meta analyses. Further summarizing scientific evidence about a specific topic by synthesizing reviews is an area of need to determine practices that have a strong evidence base and to identify areas of methodological weakness and…

This study examined the effect of a 1-day, 6-hour key word signing (KWS) workshop on in-service special education teachers' and speech-language pathologists' (SLPs) (a) skill identifying American Sign Language (ASL) signs; (b) skill producing ASL signs; (c) use of KWS in the classroom or therapy room; and (d) perceived changes from taking part in…

Between 30 and 50% of individuals with Autism Spectrum Disorder (ASD) do not develop vocal language deemed functionally acceptable to meet their daily communication needs. As a result, individuals with ASD may require intervention alternatives to vocal speech, such as augmentative and alternative communication (AAC). However, very little is known…

Signing systems that attempted to represent spoken language via manual signs -- some invented, and some borrowed from natural sign languages -- have historically been used in classrooms with deaf children. However, despite decades of research and use of these systems in the classroom, there is little evidence supporting their educational…

Key word signing, an unaided augmentative, and alternative communication (AAC) system is commonly used by children with Down syndrome who attend mainstream primary schools. To ensure the successful use of key word signing within a mainstream environment, a meaningful, contextually appropriate sign vocabulary must be available to all communication…

Two hundred and fifty years ago, L'Epée and Heinicke were engaged in a disagreement over the role of signs in the education of deaf students, with L'Epée supporting both natural and methodical signs and Heinicke advocating for an oral method without a manual component. This was the beginning of the oral/manual controversy. This controversy set a…

There is a pressing need for effective pedagogical methods of manual languages, as evident in the decline of manual languages, such as New Zealand Sign Language (NZSL). Despite being recognized as one of New Zealand's official languages, recent censuses have shown that fluent NZSL signers have been steadily decreasing. There is a cultural…

Advocates of bimodal bilingual (Bi-Bi) early intervention argue that both visual and auditory communication systems reflect optimal family and educational interactions for teachers, families, and their young children with hearing loss. The primary objective of this commentary is to highlight semantic variations noted in theoretical, ideological,…

This article explores the available research literature on language development and language interventions among deaf and hard of hearing (d/hh) children. This literature is divided into two broad categories: Research on natural languages (specifically American Sign Language and spoken English) and research on communication systems (specifically…

Because sign languages have two main articulators, signers simultaneously experience both possibilities and constraints in the articulation and perception of linguistic messages. Sign languages commonly convey different linguistic units with each hand, and additional information is conveyed in nonmanual signals. Meaningful perseverations (or sign…