Is g Real or Just Statistics? A Monologue with a Testable Prediction
At the Start: What Is g?
In 1904, Charles Spearman identified the “positive manifold”: individuals who perform well on one cognitive test tend to perform well on others. Applying factor analysis - or extracting the first principal component - to a battery of diverse tests, such as those assessing reasoning, memory span, processing speed, and vocabulary, …
