Still, today’s psychologists tend to agree on several important points: for example, that introverts and extroverts differ in the level of outside stimulation that they need to function well. Introverts feel “just right” with less stimulation, as when they sip wine with a close friend, solve a crossword puzzle, or read a book. Extroverts enjoy the extra bang that comes from activities like meeting new people, skiing slippery slopes, and cranking up the stereo. “Other people are very arousing,” says the personality psychologist David Winter, explaining why your typical introvert would rather spend her vacation reading on the beach than partying on a cruise ship. “They arouse threat, fear, flight, and love. A hundred people are very stimulating compared to a hundred books or a hundred grains of sand.”
Many psychologists would also agree that introverts and extroverts work differently. Extroverts tend to tackle assignments quickly. They make fast (sometimes rash) decisions, and are comfortable multitasking and risk-taking. They enjoy “the thrill of the chase” for rewards like money and status.
Introverts often work more slowly and deliberately. They like to focus on one task at a time and can have mighty powers of concentration. They’re relatively immune to the lures of wealth and fame.
Our personalities also shape our social styles. Extroverts are the people who will add life to your dinner party and laugh generously at your jokes. They tend to be assertive, dominant, and in great need of company. Extroverts think out loud and on their feet; they prefer talking to listening, rarely find themselves at a loss for words, and occasionally blurt out things they never meant to say. They’re comfortable with conflict, but not with solitude.
Introverts, in contrast, may have strong social skills and enjoy parties and business meetings, but after a while wish they were home in their pajamas. They prefer to devote their social energies to close friends, colleagues, and family. They listen more than they talk, think before they speak, and often feel as if they express themselves better in writing than in conversation. They tend to dislike conflict. Many have a horror of small talk, but enjoy deep discussions.
A few things introverts are not: The word introvert is not a synonym for hermit or misanthrope. Introverts can be these things, but most are perfectly friendly. One of the most humane phrases in the English language—“Only connect!”—was written by the distinctly introverted E. M. Forster in a novel exploring the question of how to achieve “human love at its height.”
Nor are introverts necessarily shy. Shyness is the fear of social disapproval or humiliation, while introversion is a preference for environments that are not overstimulating. Shyness is inherently painful; introversion is not. One reason that people confuse the two concepts is that they sometimes overlap (though psychologists debate to what degree). Some psychologists map the two tendencies on vertical and horizontal axes, with the introvert-extrovert spectrum on the horizontal axis, and the anxious-stable spectrum on the vertical. With this model, you end up with four quadrants of personality types: calm extroverts, anxious (or impulsive) extroverts, calm introverts, and anxious introverts. In other words, you can be a shy extrovert, like Barbra Streisand, who has a larger-than-life personality and paralyzing stage fright; or a non-shy introvert, like Bill Gates, who by all accounts keeps to himself but is unfazed by the opinions of others.
You can also, of course, be both shy and an introvert: T. S. Eliot was a famously private soul who wrote in “The Waste Land” that he could “show you fear in a handful of dust.” Many shy people turn inward, partly as a refuge from the socializing that causes them such anxiety. And many introverts are shy, partly as a result of receiving the message that there’s something wrong with their preference for reflection, and partly because their physiologies, as we’ll see, compel them to withdraw from high-stimulation environments.
But for all their differences, shyness and introversion have in common something profound. The mental state of a shy extrovert sitting quietly in a business meeting may be very different from that of a calm introvert—the shy person is afraid to speak up, while the introvert is simply overstimulated—but to the outside world, the two appear to be the same. This can give both types insight into how our reverence for alpha status blinds us to things that are good and smart and wise. For very different reasons, shy and introverted people might choose to spend their days in behind-the-scenes pursuits like inventing, or researching, or holding the hands of the gravely ill—or in leadership positions they execute with quiet competence. These are not alpha roles, but the people who play them are role models all the same.
If you’re still not sure where you fall on the introvert-extrovert spectrum, you can assess yourself here. Answer each question “true” or “false,” choosing the answer that applies to you more often than not.*
1. _______ I prefer one-on-one conversations to group activities.
2. _______ I often prefer to express myself in writing.
3. _______ I enjoy solitude.
4. _______ I seem to care less than my peers about wealth, fame, and status.
5. _______ I dislike small talk, but I enjoy talking in depth about topics that matter to me.
6. _______ People tell me that I’m a good listener.
7. _______ I’m not a big risk-taker.
8. _______ I enjoy work that allows me to “dive in” with few interruptions.
9. _______ I like to celebrate birthdays on a small scale, with only one or two close friends or family members.
10. _______ People describe me as “soft-spoken” or “mellow.”
11. _______ I prefer not to show or discuss my work with others until it’s finished.
12. _______ I dislike conflict.
13. _______ I do my best work on my own.
14. _______ I tend to think before I speak.
15. _______ I feel drained after being out and about, even if I’ve enjoyed myself.
16. _______ I often let calls go through to voice mail.
17. _______ If I had to choose, I’d prefer a weekend with absolutely nothing to do to one with too many things scheduled.
18. _______ I don’t enjoy multitasking.
19. _______ I can concentrate easily.
20. _______ In classroom situations, I prefer lectures to seminars.
The more often you answered “true,” the more introverted you probably are. If you found yourself with a roughly equal number of “true” and “false” answers, then you may be an ambivert—yes, there really is such a word.
But even if you answered every single question as an introvert or extrovert, that doesn’t mean that your behavior is predictable across all circumstances. We can’t say that every introvert is a bookworm or every extrovert wears lampshades at parties any more than we can say that every woman is a natural consensus-builder and every man loves contact sports. As Jung felicitously put it, “There is no such thing as a pure extrovert or a pure introvert. Such a man would be in the lunatic asylum.”
This is partly because we are all gloriously complex individuals, but also because there are so many different kinds of introverts and extroverts. Introversion and extroversion interact with our other personality traits and personal histories, producing wildly different kinds of people. So if you’re an artistic American guy whose father wished you’d try out for the football team like your rough-and-tumble brothers, you’ll be a very different kind of introvert from, say, a Finnish businesswoman whose parents were lighthouse keepers. (Finland is a famously introverted nation. Finnish joke: How can you tell if a Finn likes you? He’s staring at your shoes instead of his own.)