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Chapter 7: Intelligence and the Brain

Chapter 7: Intelligence and the Brain

pp. 172-202

Authors

, University of Washington
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Summary

The human brain, a 3-pound mass of interwoven nerve cells that controls our activity, is one of the most magnificent – and mysterious – wonders of creation.

President George H. W. Bush, July 17, 1990 (Presidential Proclamation 6158 designating the 1990s as the “Decade of the Brain”)

He's a nice guy but he played too much football with his helmet off.

President Lyndon Johnson, referring to Congressman (later President) Gerald Ford. Ford had been a collegiate football star. Attribution by Schnakenberg (2004).

The two presidents were right. President Bush (or his speechwriter) described the brain accurately – a very complex bit of circuitry. President Johnson's description of Ford may not have been accurate, but he was right that bouncing the brain is not a good thing. A modern playwright put the matter in a slightly different way.

Merkin's brain has a mind of its own.

Act I of Below the Belt, a 1997 play by Richard Dresser

Every expression of intelligence is due to actions of the brain. What actions a brain will take in a given situation depends upon both the brain's structure and its history. This chapter will focus on individual differences in brain structures and processes related to intelligence. The topic is exciting. Findings are coming in so fast that it is hard to make sense of all of them. My computer literature search for papers on BRAIN AND INTELLIGENCE retrieved 5,648 citations. Neither I nor anyone else has read them all.

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