VIDEO: Nobel-Prize winning psychologist say's Obama a "slow thinker"
cnn / Christiane Amanpour

CNN) – In the United States, two men with two very different approaches to leadership and decision making are vying to become president.

For decades, Nobel Prize-winning psychologist Daniel Kahneman has studied thinking processes and the machinery of the mind.

In his latest book, "Thinking, Fast and Slow,” he lays out a school of psychology that groups people in two different modes of thinkers:

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