The boundary effect, namely the infants' failures to compare small and large numerosities, is well documented in studies using visual stimuli. The prevailing explanation is that the numerical system used to process sets up to 3 is incompatible with the system employed for numbers >3. This study investigates the boundary effect in 10-month-old…

The prevalent "core phonological deficit" model of dyslexia proposes that the reading and spelling difficulties characterizing affected children stem from prior developmental difficulties in processing speech sound structure, for example, perceiving and identifying syllable stress patterns, syllables, rhymes and phonemes. Yet spoken word…

Generalization in motor control is the extent to which motor learning affects movements in situations different than those in which it originally occurred. Recent data on orofacial speech movements indicates that motor sequence learning generalizes to novel syllable sequences containing phonotactically illegal, but previously practiced, consonant…

Cross-sectional studies have already addressed the question of the syllable's role in the first steps of reading acquisition--though with mixed results. To determine whether and when (1) syllables become units that drive the segmentation of and access to words and how (2) sublexical orthographic and phonological syllable frequency mediate the…

Purpose: The adaptation effect in stuttering, traditionally described as the reduction of stuttering moments over repeated readings, provides a context to investigate fluency facilitation as well as a relatively controlled means of comparing fluent speech in the immediate vicinity of words that were stuttered versus fluently produced. Acoustic…

This study investigates the role of prosody in narration as a function of Labovian narrative structure and stancetaking in identity performance. This study is both an extension and enhancement of preliminary work that looked at a handful of prosodic features in Mexican Spanish narratives, and a novel investigation into discursive acts expressed…

Purpose: Neurogenic speech and language disorders--such as acquired apraxia of speech (AOS) and aphasia with phonemic paraphasia (APP)--are often misdiagnosed due to similarities in clinical presentation. Word syllable duration (WSD)--a measure of average syllable length in multisyllabic words--serves as a proxy for speech rate, which is an…

Aims: To investigate the developmental trajectory of the rate and perceptual assessment of oral diadochokinesis (DDK) in typically developing children compared with adults. Also to examine the characteristics of DDK productions in children with speech sound disorders (SSD) and the relationship between DDK production and percentage of consonants…

Rhythmic structure in speech is characterized by sequences of stressed and unstressed syllables. A large body of literature suggests that speakers of English attempt to achieve rhythmic harmony by evenly distributing stressed syllables throughout prosodic phrases. The question remains as to how speakers plan metrical structure during speech…

Purpose: Children with residual speech sound disorders (RSSD) have shown differences in neural function for speech production, as compared to their typical peers; however, information about how these differences may change over time and relative to speech therapy is needed. To address this gap, we used functional magnetic resonance imaging (fMRI)…

The middle and high school years represent a unique challenge for students who have not yet attained proficiency with word reading. By this time, it is generally expected that students will be able to independently read a variety of texts to gain content knowledge and to read for understanding. Students with or at-risk for learning disabilities…

The role of phonological awareness and alphabet knowledge in learning to read is well established in mono-lingual English speakers. However, it is under explored in the context of English Language Learners (ELL), especially in regions like India where the native language differs phonologically and orthographically from the target literate…

Purpose: Developmental language disorder (DLD) is a multifaceted disorder. Recently, interest has grown in prosodic aspects of DLD, but most investigations of possible prosodic causes focus on speech perception tasks. Here, we focus on speech production from a speech amplitude envelope (AE) perspective. Perceptual studies have indicated a role for…

In young adults and adolescents, dyslexia typically is characterized by slow or laborious reading. These reading difficulties are underpinned at least partly by a phonological deficit that disrupts cognitive connections between spoken and written language. Prosodic stress is a phonological property of spoken language reflecting differences in…

Purpose: The aim of this study was to pilot the efficacy of rapid syllable transition (ReST) treatment when provided once per week for a 50-min treatment session for 12 weeks with five children with childhood apraxia of speech. Of central importance was the children's retention and generalization of gains from treatment as indicators of speech…