Stimulus overselectivity refers to the phenomenon whereby stimulus control over behavior is exerted only by a limited subset of the total number of stimuli present during discrimination learning. It often is displayed by individuals with autistic spectrum disorders or learning disabilities, but is not exclusive to those groups. The present studies…

We tested the structure of the Pictorial Scale of Competence and Social Acceptance (PSPCSA) across groups of first and second grade children from economically disadvantaged backgrounds. We used confirmatory factor analysis, including latent mean structures analysis, to test the fit of competing PSPCSA factor models and examined invariance across…

The current study investigated initiating and following declarative joint attention, and initiating requesting joint attention in a group of preschool children with autism spectrum disorder (ASD) and an age-matched control group. Different forms of joint attention were elicited while children interacted with their mothers. Temporal coordination of…

Recent research in cognitive neuroscience has yielded a more comprehensive understanding of brain function. Some of these diagnostic techniques include the event-related potential, which depicts brain electrical activity, and magnetic resonance imaging and positron emission tomography, which are particularly sensitive to the delineation of brain…

Neurophysiological evidence is described showing that some neurons in the macaque inferior temporal visual cortex have responses that are invariant with respect to the position, size and view of faces and objects, and that these neurons show rapid processing and rapid learning. Which face or object is present is encoded using a distributed…

The nonword repetition (NWR) test has been shown to be a good predictor of children's vocabulary size. NWR performance has been explained using phonological working memory, which is seen as a critical component in the learning of new words. However, no detailed specification of the link between phonological working memory and long-term memory…

Stuttering characteristics, assessment, and treatment principles present challenges to assessment and treatment that can be addressed with virtual reality (VR) technology. This article describes how VR can be used to assist clinicians in meeting some of these challenges with adults who stutter. A review of current VR research at the Stuttering…

Recent brain mapping studies have provided new insights into the cortical systems that mediate human speech perception. Electrocortical stimulation mapping (ESM) is a brain mapping method that is used clinically to localize cortical functions in neurosurgical patients. Recent ESM studies have yielded new insights into the cortical systems that…

Developmental studies of face processing have revealed age-related changes in how infants allocate neurophysiological resources to the face of a caregiver and an unfamiliar adult. We hypothesize that developmental changes in how infants interact with their caregiver are related to the changes in brain response. We studied 6-month-olds because this…

Previous research implies that stereotypic behavior tends to be maintained by the sensory consequences produced by engaging in the response. Few investigations, however, have focused on vocal stereotypy. The current study examined the noncommunicative vocalizations of 4 children with an autism spectrum disorder. First, functional analyses were…

Background: The conclusion from a vast literature on literacy acquisition is that letter knowledge is one of the best predictors of literacy development. The question of the best way to teach children letter sounds has not, as yet, been answered satisfactorily. Aims: The aim of this study was the evaluation of a computer training program using…

Dawnene D. Hassett and Melissa B. Schieble contend that literacy instruction must include attention to the multiple ways in which print and visual images work together. They propose ways to update accepted reading strategies "with visual texts and new literacies in mind." Using examples from picture books and graphic novels, they expand our…

In two experiments, 1.5-year-olds were taught novel words whose sound patterns were phonologically similar to familiar words (novel neighbors) or were not (novel nonneighbors). Learning was tested using a picture-fixation task. In both experiments, children learned the novel nonneighbors but not the novel neighbors. In addition, exposure to the…

A study investigated the processes used by bilinguals for organizing vocabulary by presenting subjects with bilingual word recognition tasks in two modalities (aural and visual) and using a repetition paradigm. Subjects were asked to decide whether a word presented to them was a nonsense word or a real word. Two separate experiments are described.…

The ability of 31 institutionalized trainable mentally retarded mongoloid and nonmongoloid subjects (mean IQ=27.5) to comprehend and imitate verbally presented sentences of varying levels of grammatical complexity was examined. Eight stimulus sentences were spoken for four pairs of pictures, simple declarative or kernel, negative, passive, and…