Brain Imaging Helps Redefine Intelligenceby Neuroscience News |
Neuroimaging technology has allowed researchers to measure brain entropy. Researchers report greater entropy is linked to more versatile information processing.
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Whole brain regression analysis was performed with AFNI to determine whether brain entropy predicts full scale IQ as estimated from the Shipley Institutes of Living Scale, Vocabulary Task (uncorrected p = 0.005, cluster size = 157 voxels, corrected p = 0.001). Positive beta coefficients show where increases in resting-state brain entropy predict increases in IQ NeuroscienceNews.com image is credited to Saxe et al./PLOS ONE.
People with average intelligence have an IQ score of about 100, Saxe says, with current study participants having an above-average IQ, at 108.
According to Saxe, study participants’ entropy scores were strongly tied to IQ. Using standard statistical techniques that were performed two different ways to ensure accuracy, the researchers found that higher entropy was significantly related to the brain regions where previous research has shown it matters most. Entropy scores closely matched IQ scores from the Shipley-Hartford test for the left side of the middle brain (the left inferior temporal lobe), which is tied to learning speech. Similarly, entropy scores tracked closely with those from the Wechsler test for the front region of the brain (bilateral anterior frontal lobes), a known center for organization, planning, and emotional control.
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