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In any given year, the CiteScore of a journal is the number of citations, received in that year and in previous three years, for documents published in the journal during the total period (four years), divided by the total number of published documents (articles, reviews, conference papers, book chapters, and data papers) in the journal during the same four-year period: [3]
The impact factor relates to a specific time period; it is possible to calculate it for any desired period. For example, the JCR also includes a five-year impact factor, which is calculated by dividing the number of citations to the journal in a given year by the number of articles published in that journal in the previous five years. [14] [15]
The epidemiology of autism is the study of the incidence and distribution of autism spectrum disorders (ASD). A 2022 systematic review of global prevalence of autism spectrum disorders found a median prevalence of 1% in children in studies published from 2012 to 2021, with a trend of increasing prevalence over time.
For ASD other than autism the association is much weaker: the same study reported typical levels of intelligence in about 94% of 53 children with PDD-NOS. [49] Estimates are that 40–69% of individuals with ASD have some degree of an intellectual disability, [ 31 ] with females more likely to be in severe range of an intellectual disability.
A 2003 review of epidemiological studies of children found autism rates ranging from 0.03 to 4.84 per 1,000, with the ratio of autism to Asperger syndrome ranging from 1.5:1 to 16:1; [142] combining the geometric mean ratio of 5:1 with a conservative prevalence estimate for autism of 1.3 per 1,000 suggests indirectly that the prevalence of AS ...
Grading in education is the application of standardized measurements to evaluate different levels of student achievement in a course. Grades can be expressed as letters (usually A to F), as a range (for example, 1 to 6), percentages, or as numbers out of a possible total (often out of 100).
The Kennedy Krieger Institute (/ ˈ k r iː ɡ ər /) is a nonprofit, 501(c)(3) tax-exempt, Johns Hopkins affiliate located in Baltimore, Maryland, that provides in-patient and out-patient medical care, community services, and school-based programs for children and adolescents with learning disabilities, [1] as well as disorders of the brain, spinal cord, and musculoskeletal system.
Children of IQ 180+ who are retained in the regular classroom are even more seriously at risk and experience severe emotional distress." [2] These accelerated children should be placed together in one class if possible. [3] Research suggests that acceleration might have an impact long after students graduate from high school.