|Researchers consider people who score between 85 and 115 on an IQ test to have “average” intelligence. 7 On the whole, less than 20 percent of males with Fragile X have an IQ in this range. 2 At the same time, few people with Fragile X are severely or profoundly impaired, with IQs below 40 or 25, respectively. 8 In general, those with a full mutation tend to have an IQ somewhere in between 40 and 85, which is considered mild to moderate mental impairment.
Females tend to be less seriously affected by Fragile X than males. Even among females who have full-mutation FMR1 genes, only about one-third have an IQ in the mental retardation range. 6 Females with Fragile X are more likely to have relatively normal cognitive development, or they may show a learning disability where their academic achievement in some areas is lower than their overall ability to learn. For example, a female with a learning disability in math might score several grades below her grade level in math, even though her IQ is within the normal range.
Many factors influence intelligence, and, like most individuals, people with Fragile X have areas of both strength and weakness. For example, people with Fragile X tend to have good memories for pictures and visual patterns. This ability helps them to learn to recognize letters and words. They are also generally able to follow instructions that are presented as pictures. Their main weaknesses are in thinking about abstract ideas, organizing information, planning ahead, and solving problems.
No matter what their IQ or areas of intelligence, all children and adults with Fragile X are capable of learning. Most children will progress in school and develop basic academic skills. Many adults can learn to take care of themselves and work at a job. People with Fragile X may need more time to learn, special teaching methods, or a specially tailored environment (see the Suggestions for working with individuals with Fragile X box), but they usually can and do make steady progress.
working with individuals with Fragile X
- Know the learning style of the individual.
- Develop a consistent daily schedule or routine.
- Use visual signs (pictures, sign language, logos, words) and concrete examples or materials to present ideas, concepts, steps, etc.
- Prepare the individual for any changes in routine by explaining them ahead of time, possibly using visual signs.
- Include functional goals with academic goals; for instance, teaching the individual the names of different pieces of clothing as well as how to dress him/herself.
- Provide opportunities for the child to be active and move around.
- Use computers and interactive educational software.
- Provide a quiet place where the child can retreat and regroup.