IQ is a mean of 100 and a standard deviation of 15 (16 for some tests). 99th percentile is a Z-score of 2.3263 (2.3 standard deviations above the mean). In IQ, 99th percentile, or top 1% is IQ 134.8952, or IQ 135 rounded-off (137.2216 / 137 rounded-off for SD16).
An average person scores 100 on an IQ test using the Stanford-Binet IQ scale. A score of 137 to 160 is considered the top 1 percent to . 01 percent of all scorers. Frank Lawlis, director of psychological testing for American Mensa, also joined the discussion on The Daily Circuit.
By the current "deviation IQ" definition of IQ test standard scores, about two-thirds of all test-takers obtain scores from 85 to 115, and about 5 percent of the population scores above 125.
An IQ of 120, therefore, implies that the testee is brighter than about 91% of the population, while 130 puts a person ahead of 98% of people.
85 to 114: Average intelligence. 115 to 129: Above average or bright. 130 to 144: Moderately gifted. 145 to 159: Highly gifted.
For example, on The Wechsler Adult Intelligence Scale and the Stanford-Binet test, scores that fall between 90 and 109 are considered average IQ scores. On these same tests, scores that fall between 110 and 119 are considered high average IQ scores. Scores between 80 and 89 are classified as low average.
Presuming someone actually had a 500 IQ, they would be so smart that we almost can't even imagine it. Accomplishments of such a person would most likely include: Easily completing multiple PhDs before the average person would even graduate elementary school.
The vast majority of people in the United States have I.Q.s between 80 and 120, with an I.Q. of 100 considered average. To be diagnosed as having mental retardation, a person must have an I.Q. below 70-75, i.e. significantly below average.
Born in Moscow in 1976, Nadia Camukova was estimated to have an IQ of 200. The Brain Research Institute located in Moscow reported later on that she had the highest IQ in the world. She can speak seven languages and eight Turkish dialects. Currently, she's a professor at Bahçeşehir University in Turkey.
The IQ level corresponding to the 99th percentile is 135. It means that 99% of people have IQs at most 135, and only 1% of people have IQs greater than 135.
Generally, people consider an IQ of 130 or higher to be gifted. That's in about the 97th percentile. An IQ of 135 is in the 99.0184693146 percentile. An IQ of 160 is in the 99.9968313965 percentile.
Also, 95% of the norm group has an IQ score within two standard deviations of the average. So, 95% of the norm group has a score between 70 (100 – 30) and 130 (100 + 30). This means scores of over 130 only occur in 2,5% of cases.
The standard scores on most other currently normed IQ tests fall in the same range. A score of 160 corresponds to a rarity of about 1 person in 31,560 (leaving aside the issue of error of measurement common to all IQ tests), which falls short of the Mega Society's 1 in a million requirement.
IQ 166-clever, however, feels a bit hard to swallow. Originally Answered: How reliable is the source about Lady Gaga's IQ being 166?
The Genius Threshold: 130 and Beyond
This score places an individual in the top 2% of the population, making them exceptionally intelligent. However, it's crucial to recognize that there are varying degrees of genius, with scores ranging from 130 to over 200.
The People's Republic of China, one of the largest and most populous countries in the world, is also home to some of the brightest minds on the planet. With an average IQ of 104.1, China ranks as the 5th country with the highest IQ in the world.
When asked who is the most intelligent person alive, the one with the highest IQ, most people will say Stephen Hawking. In fact, the Chinese-Australian Terence Tao is the person with the highest IQ in the world at present. With an outstanding IQ of 230, Terence Tao was born on July 17, 1975 in Adelaide, Australia.
United States - 74.88 (A+) United Kingdom - 64.19 (A) Germany - 64.18 (A) Australia - 63.96 (A)
Can IQ change with age? Yes. However, there is heavy debate over exactly how IQ and intelligence change with age. Studies have demonstrated that a person's fluid intelligence tends to decrease starting in their late 20s, while their crystallized intelligence tends to increase as they grow older.
But genetics can explain the wide range of possible IQs too because so many different genes are involved in developing and running a brain. It is possible, for example, to inherit all the higher IQ genes from each parent and leave the lower IQ ones behind. Now the child will be brighter than the parent.