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Definition
Mental Retardation - Significantly subaverage general intellectual functioning, and includes a student whose intelligence test score is two or more standard deviations below the norm on a
standardized individual intelligence test, existing concurrently with deficits in adaptive behavior and manifested during the developmental period;
Eligibility - If a child is suspected of having mental retardation, the following evaluation shall be conducted:
(A) An individually administered standardized intelligence test meeting the reliability and validity standards of the American
Psychological Association and administered by a licensed school psychologist, a psychologist licensed by a State Board
of Psychological Examiners, or other individual assigned by a school district who has the training and experience to
administer and interpret individually administered intelligence tests;
(B) The administration of a valid adaptive behavior scale;
(C) A medical statement or a health assessment statement indicating whether there are any sensory or physical factors that
may be affecting the child's educational performance;
(D) A developmental history of the child;
(E) Assessments to determine the impact of the suspected disability:
(i) On the child's educational performance when the child is at the age of eligibility for kindergarten through age 21, or
(ii) On the child's developmental progress when the child is age three through the age of eligibility for kindergarten; and
(F) Additional evaluations or assessments that are necessary to identify the child's educational needs.
For a child suspected of having mental retardation, the child shall meet all of the following minimum criteria:
(A) The child's intelligence test score is 2 or more standard deviations below the mean;
(B) The child has deficits in adaptive behavior coexistent with the child's impairment in intellectual functioning;
(C) The child's developmental level or educational achievement is significantly below age or grade norms; and
(D) The child's educational problems are not primarily the result of sensory disabilities or other physical factors.
For a child to be eligible for special education services as a child with mental retardation, the child's multidisciplinary
team shall determine that:
(A) The child's disability has an adverse impact:
(i) On the child's educational performance when the child is at the age of eligibility for kindergarten through age 21; or
(ii) On the child's developmental progress when the child is age three through the age of eligibility for kindergarten; and
(B) The child needs special education services as a result of the disability.
Definition from Oregon Administrative Rules - OAR
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