My first master’s degree was in psychometry, which is the study of tests and measurements. I worked under Dr. David Segel who was a pioneer in that field. One of the interesting things I learned in my studies was that IQ and intelligence are two different things. Many people use the terms interchangeably, but IQ (Intelligence Quotient) is a measure of your ability to perform on a certain kind of test. My mentally challenged son Tim scores very poorly on a Stanford Benet IQ test and very well on a Wechsler Bellevue IQ test. The Stanford Benet test measures an individual’s ability to manipulate and control shapes and spaces. The Wechsler Bellevue is a verbal test. The two tests measure different things, and Tim’s scores were wildly different depending on the type of test.
IQ and intelligence should not be confused. Webster’s dictionary defines intelligence as “the ability to learn and understand,” which has nothing to do with any test. IQ is radically affected by access to education, healthcare, food, living conditions, and the kind of test used. The average IQ in Kenya in 1948 was 72, and today the average is 97. A 25 point gain is not an indication of a change in intelligence, but rather a change in the ability of the people to better answer the questions on the chosen test.
It isn’t possible to compare the intelligence of humans on the basis of race or to compare humans with animals. Some animals do very well on some IQ tests. Koko, the gorilla that we have mentioned in previous issues of our journal, scores a 95 on some IQ tests according to articles in several popular magazines. Crows have high intelligence in solving certain types of problems. A food morsel floating on water in the bottom of a graduate frustrates children under eight years old because the can’t figure out how to get to it. A crow, however, will add pebbles to the graduate until the food floats up to a place where the crow can reach it. Who has the most intelligence?
An interesting area of discussion in talking about what makes a human is the question of intelligence and IQ tests. For several hundred years there have been debates among intellectuals about whether intelligence is related to race, sex, or genetics. Some interesting experiments have been conducted to measure intelligence in animals, and scientists have found that creatures from bees and ants to dolphins and crows demonstrate intelligence.
My first master’s degree was in the field of psychometry, the study of testing and measurements. One of the things I learned very early was that there are different kinds of IQ tests. Our mentally challenged foster son Tim was tested at an early age and had a Stanford Benet IQ of 42. One-hundred was the average among humans. When Tim entered the public schools, he was tested with the Otis IQ test, and his score was 110. Why were the scores so different? The Otis was verbal so that it could be administered to many people at a time. Tim’s verbal abilities are very high because my wife read to him constantly when he was a child.
Tim knows the words, but his application skills are sometimes lacking. One of our favorite stories about Tim was when he was angry with me one time he yelled at me “… and you’re causing me to commit adultery!!!” He knew that adultery was bad, but he had no idea of why.
When I was a college student, there were psychologists who maintained that Afro-Americans were less intelligent than Caucasians, because they scored lower on IQ tests. The problem was that the tests were loaded with cultural distractors that were not a part of the students’ ethnic background. In my years of teaching science in inner-city schools, I saw no variation in intelligence among kids from different backgrounds. However, to this day I hear people say that Asians are superior in intelligence and Afro-Americans are inferior. For most of my 41 years of teaching physics at the secondary level, I fought with administrators and counselors who maintained that girls were less able in the physical sciences than boys. I know that isn’t true from experience.
The bottom line is that intelligence means different things to different people and IQ tests do not show who is important or valuable. The ability to solve problems is frequently considered to be a measure of intelligence, but problem solving is frequently a function of experience or trial and error–not reasoning. For anyone to attempt to use intelligence to tell who is human and who isn’t, who should have the right to vote and who shouldn’t, or who should be allowed to survive and who shouldn’t, is illogical and in violation of everything God has taught us.