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In her book Anger: The Misunderstood Emotion, Carol Tavris recounts a story about a Bengali cobra that liked to bite passing villagers. One day a swami - a man who has achieved self-mastery - convinces the snake that biting is wrong. The cobra vows to stop immediately, and does. Before long, the village boys grow unafraid of the snake and start to abuse him. Battered and bloodied, the snake complains to the swami that this is what came of keeping his promise.
"I told you not to bite," said the swami, "but I did not tell you not to hiss."
"Many people, like the swami's cobra, confuse the hiss with the bite," writes Tavris.

Kagan hypothesized that infants born with an especially excitable amygdala would wiggle and howl when shown unfamiliar objects - and grow up to be children who were more likely to feel vigilant when meeting new people. And this is just what he found. In other words, the four-month-olds who thrashes their arms like punk rockers did so not because they were extroverts in the making, but because their little bodies reacted strongly - they were "high-reactive" - to new sights, sounds, and smells. The quiet infants were silent not because they were future introverts - just the opposite - but because they had nervous systems that were unmoved by novelty.

The way forward, I'm suggesting, is not to stop collaborating face-to-face, but to refine the way we do it. For one thing, we should actively seek out symbiotic introvert-extrovert relationships, in which leadership and other tasks are diveded according to people's natural strengths and temperaments. The most effective teams are composed of a healthy mix of introverts and extroverts, studies show, and so are many leadership structures.

Sometimes they picked the right answer despite their peers' influence. And Berns and his team found something very interesting about these moments. They were linked to heightened activation in the amygdala, a small organ in the brain associated with upsetting emotions such as the fear of rejection.
Berns refers to this as "the pain of independence," and it has serious implications. Many of our most important civic institutions, from elections to jury trials to the very idea of majority rule, depend on dissenting voices. But when the group is literally capable of changing our perceptions, and when to stand alone is to activate primitive, powerful, and unconscious feelings of rejection, then the health of these institutions seems far more vulnerable than we think.

That is, the brain scans would pick up the volunteers deciding consciously to abandon their own beliefs to fit in with the group. But if the brain scans showed heightened activity in regions associated with visual and and spacial perception, this would suggest that the group had somehow managed to change the individual's perceptions.
That was exactly what happened - the conformists showed less brain activity in the frontal, decision-making regions and more in the area of the brain associated with perception. Peer pressure, in other words, is not only unpleasant, but can actually change your view of a problem.

Psychologists usually offer three explanations for the failure of group brainstorming. The first is social loofing: in a group, some individuals tend to sit back and let others do the work. The second is production blocking: only one person can talk or produce an idea at once, while the other group members are forced to sit passively. And the third is evaluation apprehension, meaning the fear of looking stupid in front of one's peers.

The men in twenty-three of the twenty-four groups produced more ideas when they worked on their own than when they worked as a group. They also produced ideas of equal or higher quiality when working individually. And the advertising executives were no better at group work than the presumably introverted research scientists.
Since then, some forty years of research has reached the same startling conclusion. Studies have shown that performance gets worse as group size increases: groups of nine generate fewer and poorer ideas compared to groups of six, which do worse than hroups of four. The "evidence from science suggests that business people must be insane to use brainstorming groups," writes the organizational psychologist Adrian Furnham. "If you have talented and motivated people, they should be encouraged to work alone when creativity or efficiency is the highest priority."
The one exception to this is online brainstorming. Groups brainstorming electronically, when properly managed, not only do better than individuals, research shows; the larger the group, the better it performs. The same is true of academic research - professors who work together electronically, from different physical locations, tend to produce research that is more influential than those either working alone or collaborating face-to-face.

The Coding War Games are well known in tech sircles, but DeMarco and Lister's findings reach beyond the world of computer programmers. A mountain of recent data on open-plan offices from many different industries corroborates the results of the games. Open-plan offices have been found to reduce productivity and impair memory. They're associated with high staff turnover. They make people sick, hostile, unmotivated, and insecure. Open-plan workers are more likely to suffer from high blood pressure and elevated stress levels and to get the flu; they argue more with their colleagues; they worry about coworkers eavesdropping on their phone calls and spying on their computer screens. They have fewer personal and confidential conversations with colleagues. They're often subject to loud and uncontrollable noise, which raises heart rates; releases cortisol, the body'd fight-or-flight "stress" hormone; and makes people socially distant, quick to anger, aggressive, and slow to help others.
Indeed, excessive stimulation seems to impede learning; a recent study found that people learn better after a quiet stroll through the woods than after a noisy walk down a city street. Another study, of 38,000 knowledge workers across different sectors, found that the simple act of being interrupted is one of the biggest barriers to productivity. Even multitasking, that prized feat of modern-day office warriors, turns out to be a myth. Scientists now know that the brain is incapable of paying attention to two things at the same time. What looks like multitasking is really switching back and forth between multiple tasks, which reduces productivity and increases mistakes by up to 50 percent.

The New Groupthink did not arise at one precise moment. Cooperative learning, corporate teamwork, and open office plans emerged at different times and for different reasons. But the mighty force that pulled these trends together was the rise of the World Wide Web, which lent both cool and gravitas to the idea of collaboration. On the Internet, wondrous creations were produced via shared brainpower: Linux, the open-source operating system; Wikipedia, the online encyclopedia; MoveOn.org, the grassroots political movement. These collective productions, exponentially greater than the sum of its parts, were so awe-inspiring that we came to revere the hive mind, the wisdom of crowds, the miracle of crowdsourcing. Collaboration became a sacred concept - the key multiplier for success.
But then we took things a step further than the facts called for. We came to value transparency and to knock down walls - not only online but also in person. We failed to realize that what makes sense for the asynchronous, relatively anonymous interactions of the Internet might not work as well inside the face-to-face, politically charged, acoustically noisy confines of an open-plan office. Instead of distinguishing between online and in-person interaction, we used the lessons of one to inform our thinking about the other.

Studies have shown that, indeed, introverts are more likely than extroverts to express intimate facts about themselves online that their family and friends would be surprised to read, to say that they can express the "real me" online, and to spend more time in certain kinds of online discussions. They welcome the chance to communicate digitally. The same person who would never raise his hand in a lecture hall of two hundred people might blog to two thousand, or two million, without thinking twice. The same person who finds it difficult to introduce himself to strangers might establish a presence online and then extend these relationships into the real world.