Showing posts with label neuroscience. Show all posts
Showing posts with label neuroscience. Show all posts

Tuesday, June 19, 2007

Taxation without Vexation

A new study published in Science suggests that paying your taxes might actually make you feel good. Researchers gave students at the University of Oregon $100, then recorded their brain activity when they were given the chance to make anonymous donations to a food bank with some of that money. When they made their donations, the areas of their brains that lit up were the same as those associated with pleasure and reward. That finding is consistent with similar research, such as that conducted by James Rilling of Emory University, suggesting a link between altruism and positive emotions.

But the researchers here also sometimes levied a tax on the money they'd given out, telling their participants the taxed money would also go to the food bank (which it did). They found that the brain activity was the same, though not as strong, as when people gave money on their own accord.

Reporting on this finding in today's The New York Times, John Tierney writes that the results "bolster the case for 'pure altruism'"--as opposed to altruistic acts performed for selfish motives--"because the student paying the tax could not take personal credit for deciding to feed the hungry." In other words, even though they received nothing in return for their money--not even recognition for their generosity or the personal satisfaction of knowing they'd tried to do something nice for others--the participants still felt good.

Tierney quotes Ulrich Mayr, one of the study's authors, as saying, "The most surprising result is that these basic pleasure centers in the brain don’t respond only to what’s good for yourself. ... They also seem to be tracking what’s good for other people, and this occurs even when the subjects don’t have a say in what happens.”

Thursday, March 29, 2007

Cooperation: Humans' Evolutionary Legacy

Sharon Begley wrote a fascinating story for Newsweek last week about recent discoveries in the science of human evolution. She explains how technological advances are giving researchers a more precise understanding of when, how, and why humans diverged from the evolutionary path of other species.

It seems that what truly set humans from other species may have been changes in the architecture of their brains, which made them more skilled at reasoning, learning, and memory. Begley considers this finding along with the fact that humans five to six million years ago were small and had teeth suitable for fruits and nuts, but not meat. These facts, Begley writes, suggest "that early humans were more often prey than predators," an argument made by Washington University anthropologist Robert Sussman. And this conclusion has some profound implications for our understanding of human nature.

The realization that early humans were the hunted and not hunters has upended traditional ideas about what it takes for a species to thrive. For decades the reigning view had been that hunting prowess and the ability to vanquish competitors was the key to our ancestors' evolutionary success (an idea fostered, critics now say, by the male domination of anthropology during most of the 20th century). But prey species do not owe their survival to anything of the sort, argues Sussman. Instead, they rely on their wits and, especially, social skills to survive. Being hunted brought evolutionary pressure on our ancestors to cooperate and live in cohesive groups. That, more than aggression and warfare, is our evolutionary legacy.

Both genetics and paleoneurology back that up. A hormone called oxytocin, best-known for inducing labor and lactation in women, also operates in the brain (of both sexes). There, it promotes trust during interactions with other people, and thus the cooperative behavior that lets groups of people live together for the common good. By comparing the chimp genome with the human, scientists infer that oxytocin existed in the ancestor of both. But it has undergone changes since then, perhaps in how strongly the brain responds to it and in how much is produced. The research is still underway, but one possibility is that the changes occurred around the time our ancestors settled into a system based on enduring bonds between men and women, about 1.7 million years ago.

Thursday, March 8, 2007

Happiness, Inc.

The San Francisco Chronicle's Steven Winn had a piece yesterday about the recent boom in the study and the marketing of happiness, citing everything from last year's film Happyness (with Will Smith) to the international Happiness Foundation:

As the field fills with social scientists, pharmaceutical breakthroughs and brain scans, the happiness quest grows more complicated and fraught. Philosopher Sissela Bok, in a 2003 address on the subject, argued that "it's in times of high danger and turmoil that concerns for happiness are voiced most strikingly and seen as most indispensable." That's what made the "Life, Liberty and the pursuit of Happiness" language in the Declaration of Independence so ompelling. It almost might explain why sales of those smiley-face buttons boomed during the Vietnam War (50 million in 1971). And why, in our own anxious and unsettled times, happiness is once again a growth industry.

And, Winn writes, "the converse may also be true. In times of relative peace and prosperity, happiness seems self-evident and therefore a little shrill and vulgar to acknowledge." He refers to Todd Solondz's bleak and cynical 1998 film Happiness as an example of how the subject was treated when the Clinton-Lewinsky scandal seemed to be our greatest threat to national security.

I can agree with Winn's premise, but only to a point. Part of the happiness boom today is surely motivated by scientific breakthroughs, particularly in neuroscience, that just didn't happen until recently. If they were made in 1998, I think the same amount of ink would have been spilled about them then. Indeed, many of the "pharmaceutical breakthroughs" he refers to were made in the mid-90s, and they generated an entire literary sub-genre of books with the word "Prozac" in the title (Prozac Nation and Listening to Prozac both came out in 1997). And it would be misleading to imply, as Winn does, that many of today's happiness scientists embrace the concept uncritically--see Daniel Gilbert's Stumbling on Happiness, which Winn does mention--just as some of those Prozac books were skeptical about the whole idea of happiness ten years ago.

All that said, there's definitely a booming happiness industry, at least in the research and publishing worlds. I only wonder whether this happiness boom is truly sui generis, the product of this particular cultural moment, as Winn suggests--or if it's just a movement that's been escalating for the last 200+ years.

Wednesday, February 21, 2007

Human Nature Redux, Redux

Following up on Jeremy Smith's post (below) about David Brooks's recent column in The New York Times, he and I, along with Greater Good co-editor Dacher Keltner, sent this letter to the Times:

To the Editor:

In his Feb. 18 column, “Human Nature Redux,” David Brooks would have us believe that there's no such thing as "natural human goodness"--that human genes condemn us to lives of evil and nastiness. Yet cutting edge research supports the opposite conclusion: that we are wired to be good.

Consider these empirical findings: When people perform altruistic acts, the same regions of their brain light up as when they receive rewards or experience pleasure; humans are equipped with specialized "mirror neurons" that enable us to empathize with others; we produce the hormone oxytocin, which promotes social bonding, trust, and generosity; and activation of our vagus nerve, a bundle of nerves near the spinal cord, increases compassion and cooperation.

Indeed, contrary to Mr. Brooks's ill-informed column, these scientific findings reveal the deep biological roots of human goodness—which promote the kindness and cooperation vital to human survival and progress.

Dacher Keltner, Ph.D.
Professor of Psychology, UC Berkeley;
Co-editor, Greater Good magazine

Jason Marsh
Co-editor, Greater Good magazine

Jeremy Adam Smith
Managing Editor, Greater Good magazine