Word: ponderings
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...worry--no one's scanning your head as you stand in front of the beverage aisle or sit in line at the drive-through. Instead, brain scientists are asking volunteers to ponder purchasing choices while lying inside high-tech brain scanners. The resulting real-time images indicate where and how the brain analyzes options, weighs risks and rewards, factors in experiences and emotions and ultimately sets a preference. "We can use brain imaging to gain insight into the mechanisms behind people's decisions in a way that is often difficult to get at simply by asking a person or watching...
...Easy Problem? It's the one that Freud made famous, the difference between conscious and unconscious thoughts. Some kinds of information in the brain--such as the surfaces in front of you, your daydreams, your plans for the day, your pleasures and peeves--are conscious. You can ponder them, discuss them and let them guide your behavior. Other kinds, like the control of your heart rate, the rules that order the words as you speak and the sequence of muscle contractions that allow you to hold a pencil, are unconscious. They must be in the brain somewhere because you couldn...
...HARD PROBLEM, CONSIDER how you could ever know whether you see colors the same way that I do. Sure, you and I both call grass green, but perhaps you see grass as having the color that I would describe, if I were in your shoes, as purple. Or ponder whether there could be a true zombie--a being who acts just like you or me but in whom there is no self actually feeling anything. This was the crux of a Star Trek plot in which officials wanted to reverse-engineer Lieut. Commander Data, and a furious debate erupted...
Harvard psychologist Joshua Greene does brain scans of people as they ponder the so-called trolley problem. Suppose a trolley is rolling down the track toward five people who will die unless you pull a lever that diverts it onto another track--where, unfortunately, lies one person who will die instead. An easy call, most people say: minimizing the loss of life--a "utilitarian" goal, as philosophers put it--is the right thing...
These cranial wrestling matches could be televised. As people ponder a moral dilemma, brain scans show changing activity levels in a part of the brain linked to abstract reasoning and cognitive control. In brains that take the utilitarian path, this part strengthens until dominant; in brains that refuse to kill one innocent to save many, it weakens until emotion...