Amanda Guyer, a psychologist at the National Institutes of Health in Bethesda, Maryland, has found that socially withdrawn people have increased sensitivity to all kinds of emotional interactions and sensory cues, which may mean that they find pleasure where others do not. Guyer separated child subjects into “outgoing” and “reserved” groups and then had them play a game in which they had to press a button in order to win money. The reserved subjects showed two to three times more activity in the striatum region of the brain, which is associated with reward, than did the more outgoing ones.

Previous MRI studies have shown that during social situations, specific areas in the brains of loners experience especially lively blood flow, indicating a sort of overstimulation, which explains why they find parties so wearying. But Guyer’s results suggest that introverts may be more attuned to all sorts of positive experiences as well. This added sensitivity, she speculates, could mean that people who are reserved have an ability to respond quickly to situations — such as coming to your aid in a moment of need — or show unusual empathy to a friend, due to their strong emotional antennae.

Research by San Francisco psychotherapist Elaine Aron bears out Guyer’s hunch, demonstrating that withdrawn people typically have very high sensory acuity. Because loners are good at noticing subtleties that other people miss, Aron says, they are well-suited for careers that require close observation, like writing and scientific research. It’s no surprise that famous historical loners include Emily Dickinson, Stanley Kubrick, and Isaac Newton.

The Unhealthy Case of the Lonely Loner

The content introverts’ camp closely borders the land of the socially anxious. Matsuoka, for example, says she was “pathologically shy” as a child, which likely laid the groundwork for her current lifestyle, even though she grew much more confident in her 20s. Those who remain “enforced loners” long to spend time with people, but shyness and anxiety inhibit them from doing so. “Introverts are people who like to be alone,” says Paula Montgomery, an accountant from St. Louis. “I prefer to be around other people, but because of my shyness, it’s difficult for me to join groups and make friends.”

Such loners have several stress-inducing strikes against them: They may get butterflies whenever they have to face in-person encounters, and they are subject to outside pressure to be sociable. When major life problems crop up, loners are also less likely to seek out social support.

John Cacioppo, a psychologist at the University of Chicago, has highlighted social isolation as a health-risk factor on par with obesity and smoking. “Loneliness is like hunger and thirst — a signal to help your genes survive,” Cacioppo says. “When you’re lonely, there’s a stress response in your body, and it’s not healthy to sustain that for a long time.”

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    Last reviewed: By John M. Grohol, Psy.D. on 27 Aug 2007
    Published on PsychCentral.com. All rights reserved.