by Susan Cain
Today we know that the reality is far more complex. For one thing, the ARAS doesn’t turn stimulation on and off like a fire truck’s hose, flooding the entire brain at once; different parts of the brain are aroused more than others at different times. Also, high arousal levels in the brain don’t always correlate with how aroused we feel. And there are many different kinds of arousal: arousal by loud music is not the same as arousal by mortar fire, which is not the same as arousal by presiding at a meeting; you might be more sensitive to one form of stimulation than to another. It’s also too simple to say that we always seek moderate levels of arousal: excited fans at a soccer game crave hyperstimulation, while people who visit spas for relaxation treatments seek low levels.
Still, more than a thousand studies conducted by scientists worldwide have tested Eysenck’s theory that cortical arousal levels are an important clue to the nature of introversion and extroversion, and it appears to be what the personality psychologist David Funder calls “half-right”—in very important ways. Whatever the underlying cause, there’s a host of evidence that introverts are more sensitive than extroverts to various kinds of stimulation, from coffee to a loud bang to the dull roar of a networking event—and that introverts and extroverts often need very different levels of stimulation to function at their best.
In one well-known experiment, dating all the way back to 1967 and still a favorite in-class demonstration in psychology courses, Eysenck placed lemon juice on the tongues of adult introverts and extroverts to find out who salivated more. Sure enough, the introverts, being more aroused by sensory stimuli, were the ones with the watery mouths.
In another famous study, introverts and extroverts were asked to play a challenging word game in which they had to learn, through trial and error, the governing principle of the game. While playing, they wore headphones that emitted random bursts of noise. They were asked to adjust the volume of their headsets up or down to the level that was “just right.” On average, the extroverts chose a noise level of 72 decibels, while the introverts selected only 55 decibels. When working at the volume that they had selected—loud for the extroverts, quiet for the introverts—the two types were about equally aroused (as measured by their heart rates and other indicators). They also played equally well.
When the introverts were asked to work at the noise level preferred by the extroverts, and vice versa, everything changed. Not only were the introverts over-aroused by the loud noise, but they also underperformed—taking an average of 9.1 trials rather than 5.8 to learn the game. The opposite was true for the extroverts—they were under-aroused (and possibly bored) by the quieter conditions, and took an average of 7.3 trials, compared with the 5.4 they’d averaged under noisier conditions.
When combined with Kagan’s findings on high reactivity, this line of studies offers a very empowering lens through which to view your personality. Once you understand introversion and extroversion as preferences for certain levels of stimulation, you can begin consciously trying to situate yourself in environments favorable to your own personality—neither overstimulating nor understimulating, neither boring nor anxiety-making. You can organize your life in terms of what personality psychologists call “optimal levels of arousal” and what I call “sweet spots,” and by doing so feel more energetic and alive than before.
Your sweet spot is the place where you’re optimally stimulated. You probably seek it out already without being aware that you’re doing so. Imagine that you’re lying contentedly in a hammock reading a great novel. This is a sweet spot. But after half an hour you realize that you’ve read the same sentence five times; now you’re understimulated. So you call a friend and go out for brunch—in other words, you ratchet up your stimulation level—and as you laugh and gossip over blueberry pancakes, you’re back, thank goodness, inside your sweet spot. But this agreeable state lasts only until your friend—an extrovert who needs much more stimulation than you do—persuades you to accompany her to a block party, where you’re now confronted by loud music and a sea of strangers.
Your friend’s neighbors seem affable enough, but you feel pressured to make small talk above the din of music. Now—bang, just like that—you’ve fallen out of your sweet spot, except this time you’re overstimulated. And you’ll probably feel that way until you pair off with someone on the periphery of the party for an in-depth conversation, or bow out altogether and return to your novel.
Imagine how much better you’ll be at this sweet-spot game once you’re aware of playing it. You can set up your work, your hobbies, and your social life so that you spend as much time inside your sweet spot as possible. People who are aware of their sweet spots have the power to leave jobs that exhaust them and start new and satisfying businesses. They can hunt for homes based on the temperaments of their family members—with cozy window seats and other nooks and crannies for the introverts, and large, open living-dining spaces for the extroverts.
Understanding your sweet spot can increase your satisfaction in every arena of your life, but it goes even further than that. Evidence suggests that sweet spots can have life-or-death consequences. According to a recent study of military personnel conducted through the Walter Reed Army Institute of Research, introverts function better than extroverts when sleep deprived, which is a cortically de-arousing condition (because losing sleep makes us less alert, active, and energetic). Drowsy extroverts behind the wheel should be especially careful—at least until they increase their arousal levels by chugging coffee or cranking up the radio. Conversely, introverts driving in loud, overly arousing traffic noise should work to stay focused, since the noise may impair their thinking.
Now that we know about optimal levels of stimulation, Esther’s problem—winging it at the podium—also makes sense. Overarousal interferes with attention and short-term memory—key components of the ability to speak on the fly. And since public speaking is an inherently stimulating activity—even for those, like Esther, who suffer no stage fright—introverts can find their attention impaired just when they need it most. Esther could live to be a one-hundred-year-old lawyer, in other words, the most knowledgeable practitioner in her field, and she might never be comfortable speaking extemporaneously. She might find herself perpetually unable, at speech time, to draw on the massive body of data sitting inside her long-term memory.
But once Esther understands herself, she can insist to her colleagues that they give her advance notice of any speaking events. She can practice her speeches and find herself well inside her sweet spot when finally she reaches the podium. She can prepare the same way for client meetings, networking events, even casual meetings with her colleagues—any situation of heightened intensity in which her short-term memory and the ability to think on her feet might be a little more compromised than usual.
Esther managed to solve her problem from the comfort of her sweet spot. Yet sometimes stretching beyond it is our only choice. Some years ago I decided that I wanted to conquer my fear of public speaking. After much hemming and hawing, I signed up for a workshop at the Public Speaking–Social Anxiety Center of New York. I had my doubts; I felt like a garden-variety shy person, and I didn’t like the pathological sound of the term “social anxiety.” But the class was based on desensitization training, an approach that made sense to me. Often used as a way to conquer phobias, desensitization involves exposing yourself (and your amygdala) to the thing you’re afraid of over and over again, in manageable doses. This is very different from the well-meaning but unhelpful advice that you should just jump in at the deep end and try to swim—an approach that might work, but more likely will produce panic, further encoding in your brain a cycle of dread, fear, and shame.
I found myself in good company. There were about fifteen people in the class, which was led by Charles di Cagno, a wiry, compact man with warm brown eyes and a sophisticated sense of humor. Charles is himself a veteran of exposure therapy. Public speaking anxiety doesn’t keep him up at night anymore, he says, but fear is a wily enemy and
he’s always working to get the better of it.
The workshop had been in session for a few weeks before I joined, but Charles assured me that newcomers were welcome. The group was more diverse than I expected. There was a fashion designer with long, curly hair, bright lipstick, and pointy snakeskin boots; a secretary with thick glasses and a clipped, matter-of-fact manner, who talked a lot about her Mensa membership; a couple of investment bankers, tall and athletic; an actor with black hair and vivid blue eyes who bounded cheerfully across the room in his Puma sneakers but claimed to be terrified the entire time; a Chinese software designer with a sweet smile and a nervous laugh. A regular cross-section of New Yorkers, really. It might have been a class in digital photography or Italian cooking.
Except that it wasn’t. Charles explained that each of us would speak in front of the group, but at an anxiety level we could handle.
A martial arts instructor named Lateesha was first up that evening. Lateesha’s assignment was to read aloud to the class from a Robert Frost poem. With her dreadlocks and wide smile, Lateesha looked as if she wasn’t afraid of anything. But as she got ready to speak, her book propped open at the podium, Charles asked how anxious she was, on a scale of 1 to 10.
“At least seven,” said Lateesha.
“Take it slow,” he said. “There are only a few people out there who can completely overcome their fears, and they all live in Tibet.”
Lateesha read the poem clearly and quietly, with only the slightest tremor in her voice. When she was finished, Charles beamed proudly.
“Stand up please, Lisa,” he said, addressing an attractive young marketing director with shiny black hair and a gleaming engagement ring. “It’s your turn to offer feedback. Did Lateesha look nervous?”
“No,” said Lisa.
“I was really scared, though,” Lateesha said.
“Don’t worry, no one could tell,” Lisa assured her.
The others nodded their heads vigorously. Couldn’t tell at all, they echoed. Lateesha sat down, looking pleased.
Next it was my turn. I stood at a makeshift podium—really a music stand—and faced the group. The only sound in the room was the ticking of the ceiling fan and the blare of traffic outside. Charles asked me to introduce myself. I took a deep breath.
“HELLOOO!!!!” I shouted, hoping to sound dynamic.
Charles looked alarmed. “Just be yourself,” he said.
My first exercise was simple. All I had to do was answer a few questions that people called out: Where do you live? What do you do for a living? What did you do this weekend?
I answered the questions in my normal, soft-spoken way. The group listened carefully.
“Does anyone have any more questions for Susan?” asked Charles. The group shook their heads.
“Now, Dan,” said Charles, nodding at a strapping red-haired fellow who looked like one of those CNBC journalists reporting directly from the New York Stock Exchange, “you’re a banker and you have tough standards. Tell me, did Susan look nervous?”
“Not at all,” said Dan.
The rest of the group nodded. Not nervous at all, they murmured—just as they had for Lateesha.
You seem so outgoing, they added.
You came across as really confident!
You’re lucky because you never run out of things to say.
I sat down feeling pretty good about myself. But soon I saw that Lateesha and I weren’t the only ones to get that kind of feedback. A few others did as well. “You looked so calm!” these speakers were told, to their visible relief. “No one would ever know if they didn’t know! What are you doing in this class?”
At first I wondered why I prized these reassurances so highly. Then I realized that I was attending the workshop because I wanted to stretch myself to the outer limits of my temperament. I wanted to be the best and bravest speaker I could be. The reassurances were evidence that I was on my way toward achieving this goal. I suspected that the feedback I was getting was overly charitable, but I didn’t care. What mattered was that I’d addressed an audience that had received me well, and I felt good about the experience. I had begun to desensitize myself to the horrors of public speaking.
Since then, I’ve done plenty of speaking, to groups of ten and crowds of hundreds. I’ve come to embrace the power of the podium. For me this involves taking specific steps, including treating every speech as a creative project, so that when I get ready for the big day, I experience that delving-deep sensation I enjoy so much. I also speak on topics that matter to me deeply, and have found that I feel much more centered when I truly care about my subject.
This isn’t always possible, of course. Sometimes speakers need to talk about subjects that don’t interest them much, especially at work. I believe this is harder for introverts, who have trouble projecting artificial enthusiasm. But there’s a hidden advantage to this inflexibility: it can motivate us to make tough but worthwhile career changes if we find ourselves compelled to speak too often about topics that leave us cold. There is no one more courageous than the person who speaks with the courage of his convictions.
6
“FRANKLIN WAS A POLITICIAN, BUT ELEANOR SPOKE OUT OF CONSCIENCE”
Why Cool Is Overrated
A shy man no doubt dreads the notice of strangers, but can hardly be said to be afraid of them. He may be as bold as a hero in battle, and yet have no self-confidence about trifles in the presence of strangers.
—CHARLES DARWIN
Easter Sunday, 1939. The Lincoln Memorial. Marian Anderson, one of the most extraordinary singers of her generation, takes the stage, the statue of the sixteenth president rising up behind her. A regal woman with toffee-colored skin, she gazes at her audience of 75,000: men in brimmed hats, ladies in their Sunday best, a great sea of black and white faces. “My country ’tis of thee,” she begins, her voice soaring, each word pure and distinct. “Sweet land of liberty.” The crowd is rapt and tearful. They never thought this day would come to pass.
And it wouldn’t have, without Eleanor Roosevelt. Earlier that year, Anderson had planned to sing at Constitution Hall in Washington, D.C., but the Daughters of the American Revolution, who owned the hall, rejected her because of her race. Eleanor Roosevelt, whose family had fought in the Revolution, resigned from the DAR, helped arrange for Anderson to sing at the Lincoln Memorial—and ignited a national firestorm. Roosevelt was not the only one to protest, but she brought political clout to the issue, risking her own reputation in the process.
For Roosevelt, who seemed constitutionally unable to look away from other people’s troubles, such acts of social conscience were nothing unusual. But others appreciated how remarkable they were. “This was something unique,” recalled the African-American civil rights leader James Farmer of Roosevelt’s brave stand. “Franklin was a politician. He weighed the political consequences of every step that he took. He was a good politician, too. But Eleanor spoke out of conscience, and acted as a conscientious person. That was different.”
It was a role she played throughout their life together: Franklin’s adviser, Franklin’s conscience. He may have chosen her for just this reason; in other ways they were such an unlikely pair.
They met when he was twenty. Franklin was her distant cousin, a sheltered Harvard senior from an upper-crust family. Eleanor was only nineteen, also from a moneyed clan, but she had chosen to immerse herself in the sufferings of the poor, despite her family’s disapproval. As a volunteer at a settlement house on Manhattan’s impoverished Lower East Side, she had met children who were forced to sew artificial flowers in windowless factories to the point of exhaustion. She took Franklin with her one day. He couldn’t believe that human beings lived in such miserable conditions—or that a young woman of his own class had been the one to open his eyes to this side of America. He promptly fell in love with her.
But Eleanor wasn’t the light, witty type he’d been expected to marry. Just the opposite: she was slow to laugh, bored by small talk, serious-minded, s
hy. Her mother, a fine-boned, vivacious aristocrat, had nicknamed her “Granny” because of her demeanor. Her father, the charming and popular younger brother of Theodore Roosevelt, doted on her when he saw her, but he was drunk most of the time, and died when Eleanor was nine. By the time Eleanor met Franklin, she couldn’t believe that someone like him would be interested in her. Franklin was everything that she was not: bold and buoyant, with a wide, irrepressible grin, as easy with people as she was cautious. “He was young and gay and good looking,” Eleanor recalled, “and I was shy and awkward and thrilled when he asked me to dance.”
At the same time, many told Eleanor that Franklin wasn’t good enough for her. Some saw him as a lightweight, a mediocre scholar, a frivolous man-about-town. And however poor Eleanor’s own self-image, she did not lack for admirers who appreciated her gravitas. Some of her suitors wrote grudging letters of congratulations to Franklin when he won her hand. “I have more respect and admiration for Eleanor than any girl I have ever met,” one letter-writer said. “You are mighty lucky. Your future wife is such as it is the privilege of few men to have,” said another.
But public opinion was beside the point for Franklin and Eleanor. Each had strengths that the other craved—her empathy, his bravado. “E is an Angel,” Franklin wrote in his journal. When she accepted his marriage proposal in 1903, he proclaimed himself the happiest man alive. She responded with a flood of love letters. They were married in 1905 and went on to have six children.
Despite the excitement of their courtship, their differences caused trouble from the start. Eleanor craved intimacy and weighty conversations; he loved parties, flirting, and gossip. The man who would declare that he had nothing to fear but fear itself could not understand his wife’s struggles with shyness. When Franklin was appointed assistant secretary of the navy in 1913, the pace of his social life grew ever more frenzied and the settings more gilded—elite private clubs, his Harvard friends’ mansions. He caroused later and later into the night. Eleanor went home earlier and earlier.