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Studies have shown that young children with autism are not impaired on prefrontal tasks relative to what would be expected for their mental age, raising questions about the executive dysfunction hypothesis of autism. These studies did not include ventromedial prefrontal tasks, however. The present study examined whether young children with autism spectrum(More)
This study investigated social attention impairments in autism (social orienting, joint attention, and attention to another's distress) and their relations to language ability. Three- to four-year-old children with autism spectrum disorder (ASD; n = 72), 3- to 4-year-old developmentally delayed children (n = 34), and 12- to 46-month-old typically developing(More)
CONTEXT The amygdala is associated with socioemotional function and has been implicated in the pathophysiology of autism. OBJECTIVE To examine the relationship between amygdalar volume at ages 3 and 4 years and severity of clinical course and outcome at 6 years of age in children with autism spectrum disorder. DESIGN Magnetic resonance images acquired(More)
Autism is currently viewed as a spectrum condition that includes strikingly different severity levels; IQ is consistently described as one of the primary aspects of the heterogeneity in autism. To investigate the possibility of more than one distinct subtype of autism based on IQ both latent class analysis and taxometrics methods were used to classify(More)
The internet, though an invaluable and ubiquitous resource for health-related information, is perceived as being undermined by concerns about quality and reliability. Some recent developments, by permitting so-called user-generated content to be published on the internet, exacerbate these concerns. The impact of these developments, mostly characterized as(More)
Autism susceptibility genes likely have effects on continuously distributed autism-related traits, yet few measures of such traits exist. The Broader Phenotype Autism Symptom Scale (BPASS), developed for use with affected children and family members, measures social motivation, social expressiveness, conversational skills, and flexibility. Based on 201(More)
Several reports indicate that autism spectrum disorder is associated with increased rate of head growth in early childhood. Increased rate of growth may index aberrant processes during early development, may precede the onset of symptoms, and may predict severity of the disease course. We examined rate of change in occipitofrontal circumference measurements(More)
Subjectivity is discussed in the context of information processing, and its properties are considered in relation to Popper's three Worlds model of information. The uncertainties that subjectivity creates are seen as central to some problematic issues of information handling, including classification and retrieval. An appreciation of problems relating to(More)
Blanton and Jaccard (2006) questioned the 4-test regression method used by Greenwald et al. (2002) to test a pure multiplicative theory. The present authors address Blanton and Jaccard's concerns with a combination of simulations and meta-analysis. Simulations show that (a) Blanton and Jaccard's preferred simultaneous regression method has a severe power(More)