How IQ Testing Has Changed throughout History

Almost a hundred years have passed since scientists first began investigating intelligence. Since then, many competing theories have emerged to gauge mental intelligence. Sir Francis Galton, an Englishman, was among the earliest researchers who researched about the topic of intelligence in the 1800s. He established a facility to test people’s reflexes and other senses to quantify their aristocratic status.

Galton is widely regarded as a forefather of modern intelligence research due to his innovative use of psychometric and statistical methods. Because of the limitations of the available tools, his attempts to quantify biological factors were not particularly fruitful. However, his theories on intelligence were useful to subsequent researchers because they could be tested on people and the results derived helped people gauge the intelligence of their subjects.

When Did The Concept Of Intelligence Testing Originated?


Alfred Binet created the first test that resembled a modern intelligence test. It was created at the beginning of the 20th century. To identify kids who might benefit from extra help or accommodations, Binet came up with an array of questions that he assumed kids of varying ages would be able to answer correctly. His examination presupposed that while one’s IQ might rise with time, their position among their contemporaries would remain relatively constant.

German psychologist William Stern first used the term “intelligence quotient”. As determined by a test like Binet’s, mental age was calculated as 100 minus the individual’s chronological age.

Stanford University professor Lewis Madison Terman adapted the original French Binet test for use in the United States. Many of the test’s flaws were ironed out by Terman, who also created an adult-appropriate version of the test. David Wechsler used written tests to gauge an adult’s IQ to new heights in the 1930s.

Modern-day significant scientific advancements have been made in the Wechsler and Stanford-Binet tests over the past century. They are a breakthrough in psychological testing, and they can accurately gauge many different types of intelligence, including vocabulary, knowledge, arithmetic, short- and long-term memory, etc. If you are also looking forward to taking an IQ Test to gauge the level of your intelligence, head over to

What Is Intelligence Level?


IQ or Intelligence quotient is a standardized test score that quantifies a person’s cognitive abilities. The purpose of this test is to provide a numerical value for the participant’s IQ. Originally intended for use with youngsters, the test is now routinely administered to people of all ages to gauge their cognitive abilities. These days, IQ is typically determined by using contemporary tests.

These tests act as a general indicator of intelligence and are derived from the results of multiple intelligence tests.

In contrast to their forerunners, these exams feature a series of problems that must be solved in a limited amount of time while being closely monitored by an examiner. They examine a wide range of skills, such as working memory, vocabulary, speed of perception, and the ability to visualize spatial relationships.

The majority of tests report both an overall and sectional score. Because of this, one can evaluate your intelligence and performance in each domain holistically. The results of the IQ tests are presented in the form of a bell shaped curve Because of this, they are only appropriate for use with people of certain IQ levels. They are very unreliable at the extremes of the scale.

Many potential recruits in the United States Army were illiterate, but their intelligence was still evaluated using tests. People used non-verbal reasoning questions to determine IQ levels for those who could not read and write.

Several studies have shown a correlation between IQ and academic success, suggesting that early IQ test scores can be used to indicate a person’s potential for success in school and life.

IQ tests may be reliable predictors of academic success because they measure similar concepts. Given that schools typically focus on teaching students how to think critically and solve problems, it stands to reason that those who receive a higher quality education will also have a higher intelligence and academic success. Kids who miss school often have lower IQs than their classmates of the same age but have had an extra year of schooling.

Studies Of IQ And Success In The Modern Era


IQ helps determine how likely someone is to do well in school. It can’t, however, be used to predict how well they will do outside of school. Other research shows that children who are “gifted” in school may have more social problems, such as being alone, than less “gifted” children.

One study even found that people with a high IQ tend to be more “open to experience,” which is a personality trait. Even though this sounds pretty harmless, it can lead someone to try drugs like marijuana. They are more likely to look for “new” experiences because they are more willing to try new things.

How Well Do They Work?


Modern IQ tests are only accurate if your score is on the IQ scale. If your IQ test score is very low or very high, it can’t be a true reflection of your score.

IQ tests have been used to measure a person’s intelligence for a long time, but they have been “under fire” in recent years. Whether you think the tests are a good way to measure intelligence or are outdated, they do seem to show “potential” for success in school, but not necessarily in life.

Final Word

Human intelligence is essential to the kind of society in which we live. It is at the heart of making important discoveries, solving pressing problems, and displaying many other qualities we admire.

There are still a large number of unanswered questions regarding the best way to quantify intelligence and how to train and retain our brain’s cognitive abilities as we age.

Any scale can be used to measure anything. But the test is only as useful as the results it gives. In the end, the results of a random test have nothing to do with how well you perform in life and whether or not you are capable of inventing or discovering new things.

About Carolyn Lang