Purpose: The aim of this study was to longitudinally investigate parent-reported children's speech and language in early childhood as an early indicator of Indigenous Australians' school-age educational outcomes. Method: Participants were 1,534 children from the Longitudinal Study of Indigenous Children (LSIC) whose parents reported on expressive…

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…

Purpose: The purpose of this study is to characterize the local (utterance-level) temporal regularities of child-directed speech (CDS) that might facilitate phonological development in Spanish, classically termed a syllable-timed language. Method: Eighteen female adults addressed their 4-year-old children versus other adults spontaneously and also…

Purpose: The aim of this study was to examine the influence of caregivers' reports of family-related environmental confusion--which refers to the level of overstimulation in the family home environment due to auditory and nonauditory (i.e., visual and cognitive) noise--on the relation between child temperament and spoken language outcomes in…

A comprehensive theory of child language acquisition requires an evidential base that is representative of the typological diversity present in the world's 7000 or so languages. However, languages are dying at an alarming rate, and the next 50 years represents the last chance we have to document acquisition in many of them. Here, we take stock of…

Purpose: The aim of this study was to describe and explain changes in severity of speech sound disorder (SSD) and token-to-token inconsistency in children with high levels of inconsistency. Method: Thirty-nine children (aged 4;6-7;11 [years;months]) with SSDs and high levels of token-to-token inconsistency were assessed every 6 months for 2 years…

This dissertation presents a series of case studies concerned with whether the signal in a given set of measurements that we take in the course of linguistic inquiry reflects grammatical competence or performance factors. We know that performance and competence do not always covary, yet it is not uncommon to assume that measurements that we take…

Purpose: We explore the extent to which speech-language pathologists (SLPs) are operating under assumptions about speech, language, and literacy that are not supported by evidence or are contradicted by evidence. Method: SLPs (N = 106) marked the degree to which they endorsed or rejected four true and 11 myth (i.e., false) statements on a visual…

Background: We discuss a free software system (Computerized Language Analysis [CLAN]) that can enable fast, thorough, and informative language sample analysis (LSA). Method: We describe methods for eliciting, transcribing, analyzing, and interpreting language samples. Using a hypothetical child speaker, we illustrate use KidEval to generate a…

Emerging audio technologies over the last decade have provided a new, unprecedented window into the everyday lives of infants and young children. These new approaches will allow us to begin to address longstanding questions about the nature of language experiences across languages, communities and situations and the role of these experiences in…

Purpose: The purpose of this study was to examine the measurement structure of the linguistic features of speech-language pathologists' (SLPs) talk during business-as-usual therapy sessions in the public schools, and to test the longitudinal stability of a theorized dimensional structure consisting of quantity, grammatical complexity, and lexical…

Average differences in children's language abilities by socioeconomic status (SES) emerge early in development and predict academic achievement. Previous research has focused on coarse-grained outcome measures such as vocabulary size, but less is known about the extent to which SES differences exist in children's strategies for comprehension and…

The current study establishes the reliability of the Holy Qur'an as one of the earliest treatise on language acquisition by humans. This is not to say that it is a scientific treatise: Rather what we know as modern 'knowledge' finds mention in a book much older. This applies to many aspects of human life, whether they spring from scientific…

Purpose: The purpose of this study was to document whether mean length of utterance[subscript SUGAR] (MLU[subscript S]), total number of words (TNW), clauses per sentence (CPS), and/or words per sentence (WPS) demonstrated age-related changes in children with typically developing language, aged 7;0-10;11 (years;months). Method: Participants were…

Ambridge argues that the existence of exemplar models for individual phenomena (words, inflection rules, etc.) suggests the feasibility of a unified, exemplars-everywhere model that eschews abstraction. The argument would be strengthened by a description of such a model. However, none is provided. I show that any attempt to do so would immediately…