In some ways, intelligence is subjective, characterized by habits and behaviors — from regulating one's emotions to being socially charismatic and even “book smart.” Research indicates that ...

Visual illusions play tricks with the human brain and test your attentiveness. In today’s visual illusion IQ test, the challenge before you is to find the sneaky 7243 hiding among the 7342’s in just 9 ...

Optical illusions are a fascinating way to test your IQ and observation skills. These puzzling pictures challenge your brain ...

Your brain is a fascinating machine, capable of processing vast amounts of information within seconds. But how good is it at ...

Daphne Martschenko does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...