Autistic regression is one of the many mysteries in the developmental course of autism and pervasive developmental disorders not otherwise specified (PDD-NOS). Various definitions of this phenomenon have been used, further clouding the study of the topic. Despite this problem, some efforts at establishing prevalence have been made. The purpose of…

Activity level (AL) is a highly salient feature of child behaviour that has been linked to developmental outcome. Twin studies of parent-rated, observer-rated and mechanically assessed AL in childhood find that AL is genetically influenced. Few studies, however, consider whether different methods of assessing AL have a shared genetic etiology.…

The etiology of individual differences in general verbal ability, verbal learning and letter and category fluency were examined in two independent samples of 9- and 18-year-old twin pairs and their siblings. In both age groups, we observed strong familial resemblance for general verbal ability and moderate familial resemblance for verbal learning,…

Information on the development and functions of rostral prefrontal cortex (PFC), or Brodmann area 10, has been gathered from different fields, from anatomical development to functional neuroimaging in adults, and put forward in relation to three particular cognitive and behavioural disorders. Rostral PFC is larger and has a lower cell density in…

This study of 102 individuals with autism found that the brainstem and cerebellum increased in size with age but were significantly smaller in autistic patients than in controls. Analysis of the speed of development suggests that brainstem and vermian abnormalities in autism were due to an early insult and hypoplasia rather than to progressive…

Twenty-three autistic children (age 4-19) and 23 mental age-matched controls completed a task of sustained attention. Results suggest that autistic children's difficulties in sustaining attention may be attributable to developmental delay and motivational contingencies of task rather than to a primary impairment in ability to sustain attention.…

In a study by Toshiaki Hashimoto and colleagues (EC 611 142), 10 infants with developmental delay, poor eye contact, and poor facial expression underwent magnetic resonance brain imaging and were later diagnosed with autism. This offered direct evidence of abnormality of the cerebellar vermis and the brainstem at the beginning stages of behavioral…

In this paper we examine the current status of the science of ADHD from a theoretical point of view. While the field has reached the point at which a number of causal models have been proposed, it remains some distance away from demonstrating the viability of such models empirically. We identify a number of existing barriers and make proposals as…

The occurrence of developmental regression in autism is one of the more puzzling features of this disorder. Although several studies have documented the validity of parental reports of regression using home videos, accumulating data suggest that most children who demonstrate regression also demonstrated previous, subtle, developmental differences.…

This article introduces a clinical forum that considers a variety of theoretical and analytical frameworks that have been applied to developing systems in phonological theory and treatment. It explains phonological theory, in which sound properties that are marked in language are those sounds that are most complex. (Contains references.)…

Cognitive mechanisms that may account for the phenomena of whole-word phonology and phonological templates in children are described and strategies for identifying whole-word phonological patterns in normal and disordered phonologies are proposed. Intervention strategies that draw on these same mechanisms as a way to overcome their inappropriate…

Recent advances in neuroimaging and genetics technologies have enhanced our understanding of neurodevelopmental disorders in adults. The authors in this volume not only discuss such advances as they apply to adults with learning disorders, but also address their translation into clinical practice. One cluster of chapters addresses developmental…

This article suggests that disruption of social gaze interaction in the first months of life may be responsible for the core social, communicative, and imaginative/cognitive deficits of autism. Eye contact and face processing in individuals with autism, implications of a missed critical period for face processing, and implications for intervention…

The manual is intended to provide preschool educators who work with exceptional children with both theoretical background and practical guidance in teaching children with attentional deficit disorders, oppositional disorders, conduct disorders, autism, developmental learning disorders, childhood depression, borderline personality disorders, and…

This article highlights the link between lexical and phonological acquisition by considering learning by children beyond the 50-word stage and by applying cognitive models of spoken word processing to development. The effects of lexical and phonological variables on perception, production, and learning are discussed in the context of a…