Does Smarter Mean More Stable? IQ Test Score Associates With Brain Network Stability
The brains of more intelligent individuals, as measured by a standardised IQ test, are characterised by temporally more stable interactions in neural networks.
The results of the study show that the modular brain network organisation of more intelligent persons exhibited less fluctuations during the fMRI measurement session. This increased stability of brain network organisation was primarily found in brain systems that are important for the control of attention.
“…However, our results suggest that processes of controlled attention — that is, the ability to stay focused and to concentrate on a task — may play an important role for general intelligence.”