Researchers from Julius-Maximilians-Universität Würzburg (JMU) propose that intelligence is dictated by global brain connectivity rather than specific regions, challenging established theories about cognitive functioning. Their study utilized fMRI data from over 800 participants, focusing on fluid, crystallized, and general intelligence. General intelligence showed the strongest predictive power among these types. The research, led by Jonas Thiele and Dr. Kirsten Hilger, highlights the complexity of the brain and aims to advance understanding of the neural processes underlying intelligence rather than merely improving predictive accuracy.
The study delineated three intelligence types: fluid intelligence, which involves logical problem-solving and pattern recognition; crystallized intelligence, derived from knowledge and experience; and general intelligence, a combination of both. The findings suggest that intelligence is better predicted by examining the distribution and number of brain connections rather than focusing solely on specific regions, like the prefrontal cortex. Thiele and Hilger advocate for a shift in research toward deciphering the fundamental brain processes contributing to intelligence, indicating there are many more facets of cognitive ability yet to be explored. The study’s insights were published in PNAS Nexus.
