Study reports cognitive abilities mutually assist each other during development. This results in improved cognitive skills and general intelligence over time.
One of the most striking findings in psychology is that almost all cognitive abilities are positively related – on average, people who are better at a skill like reasoning are generally also better at a skill like vocabulary. This fact allows scientists and educational practitioners to summarize people’s skills on a wide range of domains as one factor – often called ‘g’, for ‘general intelligence’. Despite this, the mechanisms underlying ‘g’ and its development remain somewhat mysterious.