IQ and Intelligence

IQ and Intelligence
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?

Human uniqueness is not in our intelligence. It is our spiritual nature that sets us apart and allows us to do things such as art, music, worship, etc. Mentally challenged humans do these things, but intelligent animals do not. Animals may be intelligent and even score high on some IQ tests, but they do not have the capacity to feel guilt, to be sympathetic, or to create. IQ and intelligence aside, humans are unique because of our spiritual nature. We are created in the image of God, and that uniqueness is embodied in what the Bible calls “the soul.”
–John N. Clayton © 2018
Data from Popular Science, Spring 2018.