IQ Across the Lifespan: How Your Intelligence Changes from Childhood to Old Age

The most important concept for understanding how IQ changes with age was articulated by psychologist Raymond Cattell in the 1940s and refined by his student John Horn in the 1960s. They proposed that what we call “intelligence” is not a single entity but at least two broad, partially independent systems.

https://iqcertificate.org/blog/iq-across-the-lifespan

#life #childhood #raymondcattel #intelligence #cognitive #child #age #study #wisdom