Posted by:
me
(
)
Date: March 19, 2016 11:09AM
With Down's the lower range of IQ's is not well publicized, probably to dispel stereotypes and reduce the effect of negative expectations. Just like anyone, it varies according to opportunities to learn. "Intellectual disability was mild in 23 (19%), moderate in 36 (30%), severe in 40 (33%) and profound in 22 (18%) persons evaluated (n=121)."
http://www.down-syndrome.org/reports/313/ In the US, 40% are in the mildly mentally handicapped range.
Just like in the normal population, because of multivariate influences, the IQ distribution is a bell curve, so, yes, there are Down's people with severe to profound handicaps. Average is 50, so there are plenty who are as low as the child described.