Original sentence: (For counter-argument see figure).Capron and Duyme, 1989) Third, some scientists believe that IQ determines income, and not the other way around (Murray, 1998).However, some argue that economics cannot be the whole explanation.Second, except for extreme environments, some argue that factors associated with poverty account for little of the variance in IQ scores
Edited sentence: Capron and Duyme, 1989) Third, many scientists believe that IQ determines income, and not the other way around (Murray, 1998).However, economics cannot be the whole explanation.Second, except for extreme environments, factors associated with poverty account for little of the variance in IQ scores