Before revision:  Intelligence appears to be associated with widespread increased mean differences and decreased heterogeneity in  cortical thickness .
After revision:  Intelligence appears to be associated with widespread increased mean differences and decreased heterogeneity in the frontal lobe. In the dispersion part, intelligence was negatively correlated with the dispersion of cortical thickness in widespread areas, but not with the surface area. These results suggested that people with higher IQ are more similar in cortical thickness .