Download Autism Spectrum Disorders: A Reference Handbook by Raphael Bernier Ph.D., Jennifer Gerdts PDF

By Raphael Bernier Ph.D., Jennifer Gerdts

Autism describes a posh developmental incapacity that interferes with social interplay and conversation. signs of autism are mostly recognizable whilst kids are below the age of 3. until eventually the Nineteen Nineties, charges for autism have been typically envisioned at 1 in 2500. In 2010, notwithstanding, the estimate is now 1 in one hundred ten young children. Is the occurrence of autism expanding, or has there easily been a shift in how frequently this incapacity is clinically determined because the problem?This textual content offers a finished clarification of autism spectrum issues (ASD). Autism Spectrum problems: A Reference instruction manual educates readers approximately ASD with no counting on complicated clinical jargon, highlighting present realizing of etiology, neuroscience, and intervention. It additionally discusses the old and cultural affects of ASD and explores the debatable points of autism.

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Additional info for Autism Spectrum Disorders: A Reference Handbook (Contemporary World Issues)

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The third home videotape study in this series compared 12month-old infants with either ASD, delayed development unrelated to ASD, or typical development (Osterling, Dawson, and Munson 2002). The inclusion of infants with developmental delays without ASD was important due to the high comorbidity of ASD and intellectual disability as it is essential to distinguish which behaviors are specific to ASD versus general cognitive delays. Orienting to name, looking at people, and the frequency of directed vocalizations correctly identified 87 percent of children with ASD versus those with developmental delays (Osterling, Dawson, and Munson 2002).

5 percent (Le Couteur et al. 1996; Ritvo et al. 1989). Since identical twins share 100 percent of their genetic material and fraternal twins/siblings share only 50 percent, the differing concordance rates are often interpreted as evidence that genetic factors play a strong role in the development of ASD. 9 percent and genetic findings suggest that the risk of developing ASD rises dramatically as the level of shared genes increases. There has been extensive genetic research conducted with families containing multiple children with ASD (called “multiplex ” families).

Although children with ASD do not have larger heads at birth on average, they often experience a rapid growth of head circumference in the first year of life, which then slows after 12 months of age. The relation between head circumference and ASD symptoms is variable and findings across studies are inconsistent. Some studies have found that increased head size in ASD is advantageous and is related to higher IQ (Sacco et al. 2007) and better social skills (Dementieva et al. 2005), while others have reported deleterious relationships, such as an association between macrocephaly and delayed onset of words 28 Background and Overview of Autism Spectrum Disorders (ASDs) (Lainhart et al.

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