We all know people who are "book smart

We all know people who are "book smart." Then there are those who show "street smarts" as their strengths. Sometimes these two "smarts" combine, but more often there is an evolution of sorts related to a human's life experiences, apprenticeships, age, and formal education.

Smith's Chapter 6 explores practical intelligence and tacit knowledge relating to the changes in abilities and contexts across a lifespan. What are the internal and external forces that tweak the results of adult intellectual development? How can two people with the same I.Q. have opposite success rates in the "real world?" How do traditional views contrast with newer thoughts of human abilities?