Book Review: Stuart Ritchie’s Intelligence: All that matters

Stuart Ritchie, Intelligence: All That Matters. (Hodder & Stoughton, Kindle Edition 2016).

As an educator and leader, I try to stay up to date on research into personality and human potential. But sometimes I cannot keep up with recent findings. Stuart Ritchie’s new book helped fill the gaps.

Dr. Ritchie is a post-doc researcher at the University of Edinburgh where he is researching the development/decline of intelligence across the life span.

The point of the book is essentially to clarify the facts of the case with reference to intelligence:

“The research shows that intelligence test scores are meaningful and useful; that they relate to education, occupation and even health; that they are genetically influenced; and that they are linked to aspects of the brain. (44-45)”

Through the book Ritchie deftly explains the research with reference to each of these issues. For me to go through how he shows this would make the book superfluous. But some of the most interesting points are:

1. The differences between male and female intelligence are not in terms of the average, but in terms of the outliers. The mean IQ of men and women is roughly 100. But men skew more toward very low IQs and very high IQs. More men are significantly below average and more men are significantly above average (1226).
2. While eugenicists were interested in early IQ research, the earliest intelligence scientists were interested in helping the less intelligent to succeed. Not only so, but just like the Nazi discovery of a connection between smoking and cancer, the findings of the early eugenicist IQ researchers have been supported by later research (1192).
3. Multiple intelligences theory isn’t backed by current scientific research (355).
4. “Nevertheless, we’re lucky that the tools for raising intelligence – which might partly have caused the Flynn Effect – seem to be staring us in the face, in the form of education.” (1168-70)

The take away of the book is basically this: Intelligence, which can be measured by IQ, matters. The books that claim that hard work is more important than IQ are likely mistaken. Also, education appears to actually increase people’s IQ. This part is really important and while Ritchie never mentions him, it coinheres nicely with Arthur Whimbey’s research on training people in sequential problem solving and slowly improving their processing speed.

If you’re an educator, psychologist, parent, or political science major, I recommend that you read this book.