What are the key diagnostic criteria for Intellectual Development Disorder?
a.
Delays in intelligence (below 2SD) and 1 or more area of daily living skills. The delays must emerge before 18 years of age.
b.
Intellectual functioning that is 2 SD below average and delays in 2 or more areas of adaptive functioning. The delays must emerge before 18 years of age.
c.
Adaptive skills delayed in all three major areas of functioning and intellectual functioning 2 SD below average. The delays can emerge at any age.
d.
Delays in all areas of functioning that are well below the average range, which may begin at any age.