What I liked
For the first time, in 1912, psychologist William Stern used the formula “mental age to chronological age x 100” to show IQ. Let’s say someone was 10 years old and thought like a 10 year old, their IQ would be 100. But if, say, they were 13 years old instead of 10, their IQ would be 130.
What I didn't like
A normal iq test includes several tests that measure intelligence, such as the ability to recognize patterns, remember things quickly, do math, and think critically. People often get the wrong idea about IQ tests, thinking that they test all the information you’ve learned over the years. Instead, they actually test your ability to learn.
My overall impression
IQ, which stands for “Intelligence Quotient,” is a standard score that tells you how much smarter or less smart than your peers you are. The average score for this group is 100. By giving the same test to a huge group of people from all walks of life and then getting the average, the IQ number is found.
