What is IQ?

Intelligence Quotient, commonly known as IQ, is a measure used to assess human intelligence. It provides a standardized way to compare cognitive abilities among individuals.

But what exactly does an IQ score represent, and how did these tests originate?

The History of IQ Testing

The Beginning - 1905

The concept of measuring intelligence dates back to the early 20th century. In 1905, French psychologists Alfred Binet and Théodore Simon developed the first practical intelligence test, known as the Binet-Simon scale. Their goal was to identify children in the French educational system who required special assistance.

Stanford-Binet Scale - 1916

The concept of measuring intelligence dates back to the early 20th century. In 1905, French psychologists Alfred Binet and Théodore Simon developed the first practical intelligence test, known as the Binet-Simon scale. Their goal was to identify children in the French educational system who required special assistance.

Understanding IQ Scores in the USA

IQ scores are typically standardized with a mean of 100 and a standard deviation of 15. This means:


  • Average Intelligence: Scores between 90 and 109
  • Above Average Intelligence: Scores between 110 and 119
  • Superior Intelligence: Scores of 120 and above

it’s important to note that while IQ test aim to measure cognitive abilities such as reasoning, problem solving, and understanding, they do not encompass the full range of human intelligence or potential

Average IQ in the United States

As of recent studies, the average IQ score in the United States is approximately 97.43. However, this average can vary by state. For instance, Massachusetts boasts one of the highest average IQ scores at 104.3, a figure often attributed to the state's emphasis on education and presence of numerous academic institutions.

Notable Americans With High IQs

Several renowned American Figures are recognized not only for their contributions in their respective fields but also for their high IQ scores

  • James Woods: The actor is reported to have an IQ of 154
  • Lisa Kudrow: Best known for her role in “Friends”, Kudrow has an IQ of 154
  • Mayim Bialik: Actress and neuroscientist, Bialik has an IQ of 140
  • Shakira: The internationally acclaimed singer has an IQ of 140
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