Brendan Kelly Ph.D.

Brendan Kelly is Professor Emeritus at the University of Toronto. He is author of over 50 books including the recent "Intelligence, IQ & Perception", and "Intelligence: Where we Were, Where we Are & Where we’re Going." He holds two doctorate degrees: a Ph.D. in Mathematics (Number Theory) from U. of T. and an Ed.D. in Computer Applications from the Ontario Institute for Studies in Education, and he curates his site on Quora titled, “IQ & Intelligence.”

If someone is good at math, does that mean that he/she is intelligent?

The short answer is “yes”, if your talking about being good at advanced mathematics. (A person who is good at the executing the algorithms of arithmetic may or may not be highly intelligent. Success at the more sophisticated forms of mathematics would be needed to confirm high intelligence.) In our technological society, people who excel …

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Why do hard sciences correlate with a higher IQ compared to soft sciences? Since soft sciences are more complicated, wouldn’t it be the reverse?

You raise a very interesting question. In the process of obtaining doctorates in both mathematics and the social sciences, I’ve lived in these two worlds and I think I can speak impartially about both. The lure of pure mathematics and theoretical physics is that they contain deep problems that are self-contained and require prolonged abstract …

Why do hard sciences correlate with a higher IQ compared to soft sciences? Since soft sciences are more complicated, wouldn’t it be the reverse? Read More »

Is there a point in life (age) that your intelligence and ability to learn will be at its peak? At which point (on average) will this start to decline quickly?

In the 1940’s, psychologist Raymond B. Cattell attempted to create “culture-free” tests of intelligence. Believing that IQ tests contain implicit biases in favor of particular cultures, he sought to apply factor analysis to partition the g factor of intelligence (as measured by IQ) into two components–fluid and crystallized. He described fluid intelligence, as “a capacity …

Is there a point in life (age) that your intelligence and ability to learn will be at its peak? At which point (on average) will this start to decline quickly? Read More »

What is the average IQ of students by their chosen degree? I just found an old statistic.

Comparing average IQ’s across college majors can be misleading because the variation in IQ’s within a major is much greater than the variation across majors. That is, there is a very wide difference in the IQ’s of students in any particular major, so the person with the highest IQ in a major like education may …

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What is the correlation between IQ and job performance?

The efficacy of IQ tests in predicting job performance is well established in the research. Linda Gottfredson, one of the leading researchers in the implications of general intelligence, g, (as measured by IQ tests) states: (Gottfredson, Linda S. “Why g Matters: The Complexity of Everyday Life.” 1997. Intellignce 24 (1) pp. 79-132.) Personnel selection research …

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Is there any single word or term used to distinguish between the intellectual capabilities of humans and animals?

Intelligence for sentient beings has been defined as the ability to perceive or infer information, and to retain it as knowledge to be applied towards adaptive behaviors within an environment or context. For example, monkeys have learned how to use rocks to crack the shells of nuts to feed themselves. Corvids (including crows and ravens) …

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