IT is one of the objections to the Spearman two-factor theory 1 that the measure of general intelligence, g is not necessarily invariant for linear transformations of the test scores. I have not ...

Centuries of study have yielded many theories about how the brain gives rise to human intelligence. Some think it arises from a single region or neural network. Others argue that metabolism is key. A ...

A study published in Nature Communications in January 2026 found that general intelligence does not reside in any single ...

Jeff Hawkins has a new theory of the brain. It is interesting and persuasive. But to me, the most interesting observation in the book is not about brains – it’s about how an intelligent species could ...