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.”

Why do some people believe that having a Ph.D. makes someone superior to others, despite varying levels of intelligence and knowledge among individuals?

According to the US Census Bureau, about 40% of American adults have a bachelor’s degree, about 14% have a master’s degree, and about 2.2% have a Ph.D. or other doctoral degree (e.g., medical, legal, or academic doctorates). Since gaining entry into a Ph.D. or doctoral program requires exceptional performance at the earlier levels, those of …

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What is the origin and meaning of the term “common sense”? Does it refer to something being common or to a person’s intelligence level?

The meaning of the term “common sense” has evolved over the past 2800 years, since Aristotle, of Ancient Greece introduced the term “sensus communis” (Latin meaning “a sense shared by all”). It was Aristotle’s belief that all humans gain information about the world through their five senses and this information is stored as latent knowledge …

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What are the potential emotional and social benefits of being intellectually gifted?

Intellectual giftedness is a double-edged sword. It comes with remarkable potential benefits as well as significant social challenges. A person who is intellectually gifted learns easily, can problem-solve at very high levels, and indulge in sophisticated abstract thought. This means that with sufficient work they can learn virtually any academic subject. For such a person, …

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Can you tell me more about your life as a high IQ person? It really helps me understand myself and my children.

Miika, I will not write about my personal experiences, because I don’t want to make this post about me, but I will share with you what I have learned about high IQ people and their life experiences. I hope this will be helpful to you as your raise your children. People of high intelligence have …

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Is there evidence to support the belief that this generation is less intelligent than previous generations? What factors contribute to this belief and what evidence contradicts it?

To investigate this question, it’s important to recognize that intelligence is not an absolute quality, but is a cognitive capacity to succeed in a particular environment. The famous quote, “Everyone is a genius, but if you judge a fish by its ability to climb a tree, it will live its whole life believing that it …

Is there evidence to support the belief that this generation is less intelligent than previous generations? What factors contribute to this belief and what evidence contradicts it? Read More »

Can someone with average intelligence become an excellent mathematician or theoretical physicist? If so, what steps can they take to achieve this?

It is extremely unlikely that anyone of average intelligence could develop enough expertise to become a research mathematician or theoretical physicist, but there is a remote possible exception. The rarified intellectual realm at the top levels of mathematical research was well depicted in the 1997 movie Good Will Hunting. When Fields Medalist, Professor Gerald Lambeau, …

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Can an exceptionally intelligent person come from a low-class background?

In answering this question, I will assume that “low-class background” refers to a low socioeconomic background. The good news for anyone from a low socioeconomic background is that your intellectual potential is determined to a large extent by the genes you inherit. In 2011, a large group of researchers published a paper stating: (See: Davies, …

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What is the reason behind some people’s constant need to be right, even when others may have more knowledge on a subject?

We have all met people who speak with great certainty about things in which they are not well versed. When challenged they tend to double down on their certainty and refuse to accept the possibility that they may be mistaken. I had a brother-in-law, now deceased, who used to respond to any of my opinions …

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