Low-Incidence & High-Incidence Disabilities

Eagleton, Maya
April 2018
Low-incidence & High-incidence Disabilities -- Research Starters;4/2/2018, p1
Research Starter
The categories of student disabilities are known as Low-incidence and High-Incidence. Low-incidence (LI) disabilities are rare, and high-incidence (HI) disabilities, which are more common, occur in about 1 in 10 school-age children. The number of students labeled with a disability has increased 151% in the past 20 years, partly as a result of the increased survival rate of premature babies, who are 2-3 times more likely to have HI disabilities such as learning disabilities (LD) and attention deficit disorder (ADD) or attention deficit hyperactivity disorder (ADHD). While it's relatively easy to identify students who have LI disabilities, HI disabilities are harder to assess. If evaluation comes too late, there is a missed opportunity to prevent or at least reduce the impact of the disability on the child. Two ways that students are assessed for HI disabilities are a) The aptitude-achievement model/IQ discrepancy approach and b) Response to Intervention.


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