All such tests have a “floor” — a point beyond which the test is not able to measure cognitive functioning below a given level, usually an IQ of around 40 points. IQ testing showed that the mean IQ of the mosaic group was 12 points higher than the mean of the non-mosaic group. But many people with intellectual disability, such as those with Down syndrome, fragile X syndrome and autism spectrum disorder (ASD), have scores that may be lower than the floor. It's characterized by a variety of distinctive physical features, an increased risk of certain medical problems, and varying degrees of developmental and intellectual delays. Growth charts for children with Down syndrome in the United States are available for download below. I think that Meg would have been assessed as having a fairly high IQ for a person with Down syndrome. We older children were all born before the war. There are many misconceptions about people with Down syndrome. How accurately indicative that was I … For example, people with mosaic Down syndrome typically have a higher IQ than those with other forms of Down syndrome. One report published in 1991 on mental development in Down syndrome mosaicism compared 30 children with mosaic Down syndrome with 30 children with typical Down syndrome. Meg was the fifth and last child in the family. These charts can help healthcare providers monitor growth among children with Down syndrome and assess how well a child with Down syndrome is growing when compared to peers with Down syndrome. Das Down-Syndrom ist ein angeborenes Zusammentreffen einer geistigen Behinderung und körperlicher Fehlbildungen.Die Ursache liegt in einem Fehler an den Erbanlagen des betroffenen Menschen (Genommutation, Chromosomenaberration oder Aneuploidie).Dabei ist das Chromosom 21 (Chromosomen sind Bestandteile von Zellen, auf denen Erbinformationen gespeichert sind) oder Teile … Margaret Judith Hooper was born 6 May 1946, when our mother was 36. The test battery is also being used in the Down Syndrome Cognition Project, a multi-site investigation of the genetic basis for the high degree of variation in cognitive ability among people with Down syndrome and alongside neuroimaging studies by Dr. Julie Korenberg at the University of Utah. Down syndrome, also known as trisomy 21, is a genetic disorder that occurs when a person has a full or partial extra copy of chromosome 21. Diagnosis Doctors can perform tests to screen for Down syndrome during pregnancy.