Before revision: Other psychologists such as Robert J. Sternberg and Elena Grigorenko have cautioned that IQ comparisons between rich and poor nations can be "dangerously misleading" and that comparisons which extent beyond the industrialized West are essentially meaningless.
After revision: Other psychologists such as Robert J. Sternberg and Elena Grigorenko have cautioned that IQ comparisons between rich and poor nations can be "dangerously misleading" and that comparisons which extend beyond the industrialized West are essentially meaningless.