Critical interpretation of full-scale IQ scores. To further simplify it: An IQ of 75 means that an 8-year-old child will function intellectually overall at 75% of the average 8-year-old's intellectual functioning ie, at an average of a 6-year-old level.
Diagnosing Intellectual Disability
A full-scale IQ score of around 70 to 75 indicates a significant limitation in intellectual functioning. However, the IQ score must be interpreted in the context of the person's difficulties in general mental abilities.
Approximate IQ range of 50 to 69 (in adults, mental age from 9 to under 12 years). Likely to result in some learning difficulties in school. Many adults will be able to work and maintain good social relationships and contribute to society.
A child with IQ between 70-90 is said to have borderline mental retardation, IQ between 70-51 is mild mental retardation, and IQ between 50-36 is modulated mental retardation.
If the 10-year-old had a mental age of 8, the child's IQ would be 8/10 × 100, or 80. Based on this calculation, a score of 100—where the mental age equals the chronological age—would be average. Few tests continue to involve the computation of mental ages. See also Lewis Terman; Alfred Binet.
An individual's IQ does not change with age. In other words: if you did an IQ test now and then another one in 10 years' time, your IQ score will probably be very similar. This is because IQ is always measured relative to other people your age.
Plot. In 1981, a man named Forrest Gump recounts his life story to strangers who happen to sit next to him at a bus stop. As a boy in 1956, Forrest has an IQ of 75 and is fitted with leg braces to correct a curved spine.
Lower than average scores on IQ tests. Difficulties talking or talking late. Having problems remembering things. Inability to connect actions with consequences.
FAQs (Frequently Asked Questions) When did Elon Musk take an IQ test? The Tesla CEO is estimated to have an IQ score of around 155.
An average person has an IQ of between 90 and 109. Here are how other scores rate: Scores of 80 to 89 are considered low average. Scores of 70 to 79 are considered borderline impaired.
In this context, we also need to say that while average scores for 16 or 17 year-olds are around 108, kids' IQ scores who are younger are around 120.
Mild intellectual disability
The measured IQ for persons with mild ID is between 50–55 and 70 (based on population mean of 100; 1 standard deviation of 15, and margin of measurement error of ±5) (8,10,13-16).
What Is the Lowest IQ Ever? There's no record of the lowest IQ ever. However, the lowest IQ score possible is zero.
Early twin studies of adult individuals have found a heritability of IQ between 57% and 73%, with some recent studies showing heritability for IQ as high as 80%. IQ goes from being weakly correlated with genetics for children, to being strongly correlated with genetics for late teens and adults.
Einstein never took an IQ score test. However, based on his historical records, academics have estimated his score to be around 160.
Like most aspects of human behavior and cognition, intelligence is a complex trait that is influenced by both genetic and environmental factors.
Richard Nisbett, professor of psychology at the University of Michigan: Yes, your IQ can change over time. But [IQ] tests give you the same answer to a very substantial extent, even over a period of year. The older you are, the more stable your test score will be.
Scores of 80-89 are considered to be in the Low Average range of intellectual functioning. Scores of 90-109 are Average. Scores of 110-119 are High Average. An IQ of 125 is considered by many schools to be “gifted.” Scores of 120-129 are Superior.