# How is general intelligence measured?

When we compare a person's mental age to their chronological age, we get the IQ, which is a measure of intellect that is adjusted for age. The following formula may be used to calculate IQ quickly: Mental age divided by chronological age multiplied by 100 equals IQ. For example, if someone was born in January of 1900 and now lives until January of 2100, they would be 120 years old at birth and could be considered an adult cognitively. Their mental age as estimated by professionals who examine them is 20 years old, so their IQ would be 60, using this calculation.

The average IQ in the United States is 100, and most people have an IQ between 75 and 125. However some research has shown that older adults may have an increase in brain power called "mild cognitive impairment", which is defined as experiencing significant problems with memory or other cognitive functions but not enough to be diagnosed as dementia. If someone has an IQ below 70, they are considered to have intellectual disability/developmental delay. People who have an IQ above 130 are considered to have genius syndrome.

Intelligence can be improved through learning. The more you learn, the smarter you become. This is why many people think students who go to college or join the military to gain experience will improve their IQ because they are learning new things and expanding their knowledge bases.

Intelligence can also be lost due to illness, injury, or aging.

## How is IQ measured?

Ratio IQ Score: IQ test scores were calculated by dividing a person's operating age by their actual age and multiplying the result by 100. For example, if a person can complete the job of a 25-year-old but is only 20 years old, their IQ is 125 (25/20 X 100 = 125). Although this method is still used today in some countries such as India, it has been largely replaced by more accurate methods such as the Wechsler Scales.

Wechsler Adult Intelligence Scale (WAIS): The WAIS is the most commonly used intelligence test today. It is a paper-and-pencil test that requires about 3 hours to complete. The test has two main sections: one that measures verbal ability and another that measures nonverbal ability. There are also subtests within each of these main sections that measure specific abilities such as reasoning or comprehension. The WAIS was developed by David Wechsler and his colleagues at Columbia University who revised and updated the test many times over the years.

The WAIS has several advantages over other IQ tests because it covers both verbal and nonverbal abilities. Most other tests focus on one type of ability rather than both. In addition, the WAIS takes approximately the same length of time to complete as other popular intelligence tests such as the SAT and ACT. Also, the WAIS yields a single score that represents an individual's general cognitive ability.

## How can we measure the IQ of a person?

An intelligence test can be used to determine a person's IQ. By definition, the average IQ is 100. A score of 100 or more indicates that you fared better than the typical individual, while a score of less than 100 indicates that you performed (slightly) worse. There are several different types of intelligence tests, which will be discussed below.

The most popular type of intelligence test is called a "cognitive ability test." These tests look at a person's reasoning skills, memory, language abilities, and other mental processes that are required for learning. The cognitive ability test does not try to measure emotional intelligence or personality traits such as honesty or friendliness; rather, it measures how effectively a person uses their brain.

In addition to the cognitive ability test, there are three main types of psychological tests: projective, personality, and aptitude/interest. Projective tests look at how people act in certain situations to see what kind of feelings they may have. For example, a psychologist might show someone a picture of a snake and tell them not to think about black cats, and then watch how they respond to see what kind of feeling they have toward snakes. This test would be projective because it looks at how people act without knowing their reason for doing so. Another example of a projective test would be the Rorschach Inkblot Test, where a psychologist shows someone various inkblots and records what images they remember later.

##### Juan Franklin

Juan Franklin is a lifestyle writer with an emphasis on self-help and social media. He loves to share his knowledge about life hacks, home remedies, productivity tips, and more! Juan became a freelance writer at the age of 18 when he discovered that people were willing to pay him for his advice. Now he has over 10 years of experience.

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