Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 7

In looking for physical differences in Einstein's brain, researchers found that he had a 15% wider (a) _____, which is involved in visual-spatial and mathematical thinking. By using MRI brain scans and intelligence tests, researchers found that the thickness of the brain's cortex began (b) _____ in highly intelligent children, but became (c) _____ than the cortexes in children with average intelligence by adolescence. By the age of 19, the cortex of highly intelligent children was (d) _____ in thickness to that of children with average intelligence.