It’s so inconceivable that Davis counts himself among the skeptics of the new research that documents the decline. “Put me down,” he said, “as intrigued by it.” He points out that Konrath, along with coauthors Edward O’Brien and Courtney Hsing, are drawing their conclusions from a relatively small sample size — just 72 studies over three decades. He and others would like to see more work on the matter before making any final conclusions about how much young people care, or don’t care, about others. But even some skeptics agree that it’s disturbing to consider the trend laid out in the new research and then play out the string.

“Do a thought experiment,” said Mark Davis, a professor of psychology at Eckerd College in Florida who’s spent the last 30 years studying empathy. “Imagine if humans didn’t have the capacity for empathy. What would it mean if, in fact, we never gave a damn about what happened to other people? That’s an almost an inconceivable world.”

idea, and it’s fair to say that most of us don’t spend our days wondering if we’re empathetic. Yet psychologists have been trying to measure empathy for decades, recognizing its inherent value to humanity. A world without empathy, they say, is a world we wouldn’t want to live in.

“To me, that’s the basic glue,” said Sara Konrath, a research assistant professor and the lead author of the study on empathy. “It’s so rewarding to connect with human beings. It’s so good for our bodies to do this. Everything we know as psychologists tells us it’s the most wonderful thing. So if we’re losing that, I think that is distressing.”

According to the findings, today’s students are generally less likely to describe themselves as “soft-hearted” or to have “tender, concerned feelings” for others. They are more likely, meanwhile, to admit that “other people’s misfortunes” usually don’t disturb them. In other words, they might be constantly aware of their friends’ whereabouts, but all that connectedness doesn’t seem to be translating to genuine concern for the world and one another.

But new research suggests that behind all this communication and connectedness, something is missing. The study, conducted by researchers at the University of Michigan Institute for Social Research, found that college students today are 40 percent less empathetic than they were in 1979, with the steepest decline coming in the last 10 years.

Young Americans today live in a world of endless connections and up-to-the-minute information on one another, constantly updating friends, loved ones, and total strangers — “Quiz tomorrow...gotta study!” — about the minutiae of their young, wired lives. And there are signs that Generation Wi-Fi is also interested in connecting with people, like, face-to-face, in person. The percentage of high school seniors who volunteer has been rising for two decades.

Such studies have obvious flaws. Some people, when surveyed, want to give answers that reflect positively on them. However, researchers have found that these scales are actually effective at predicting how people will behave. Spouses who score higher on empathic concern are more likely to offer emotional support to their partners. People capable of seeing another person’s perspective are more likely to help and less likely to exhibit aggression. And those who are narcissistic are probably going to be less empathetic. “Generally speaking,” said Pincus, “there’s a lack of empathy as narcissism increases.”

Given its obvious importance to relationships and the human experience, psychologists began studying the issue in the early to mid-20th century. Some researchers have conducted live experiments, staging scenes where someone is suffering and then gauging how observers respond to watching the pain. Others, meanwhile, have developed surveys where people are asked to self-report how they feel, or don’t feel, about others or themselves in certain situations. The survey respondents usually then receive a score, essentially assigning a number to describe just how empathetic they are or aren’t.

In small ways, psychologists say, empathy is constantly driving our daily lives, as we take into consideration how other people might feel before we act. Some suggest that empathy is the foundation for social norms, even basic etiquette. We typically don’t insult people to their faces, Davis explained, in part because we know they’re not going to like how that feels.

But at the most basic level, most concur that empathy is some sort of emotional response to another person’s plight, pain, state, or suffering. “It’s not just putting oneself in another’s shoes,” said Aaron L. Pincus, a professor of psychology at Penn State University. “It’s truly grasping what they’re experiencing....Your emotional state will move in a direction more similar to the person you’re empathizing with.”

Empathy is such a basic ingredient of the human experience that even babies exhibit it, crying when other children cry or reacting to the facial expressions of adults and parents. Yet the word itself is relatively new: It didn’t enter the English lexicon until the early 1900s, derived from the German word einfühlung, according to Daniel Batson, a researcher of empathy and professor emeritus at Kansas University. And psychologists studying empathy still disagree on some basic questions about how it should be defined: Is it feeling for others? Feeling as others feel? Understanding how others feel? Or some combination of the above?

“As awful a species as we can be — and we certainly have the capacity for terrible things — we’re also capable of some pretty wonderful things, noble things, self-sacrifice,” said Davis. “And the fear would be, if there really is a genuine decline in our ability to act on this capacity we have, the world becomes meaner.”

These students, Konrath points out, would have been born in the 1980s, raised in the ’90s on video games, 24-hour cable television, and widespread divorce, and sent off to college with laptops and cellphones — the young pioneers of the digital age. Perhaps, some suggest, technology has connected them in one sense, but pushed them away from each other in another. “It’s very shallow, a lot of these connections,” said Jean Twenge, coauthor of “The Narcissism Epidemic: Living in the Age of Entitlement.” “You don’t really have an emotional connection with someone on Facebook.”

The answers, to date, are all speculative. What’s clear, Konrath said, is that something critical began happening about a decade ago when a new crop of college students began taking these standard surveys.

The results have led to the obvious follow-up questions: What cultural changes may have shaped children in the 1980s and ’90s, giving rise to a less empathetic generation? Why do we care less? And is there any way we can reverse the trend?

Perhaps more than any other characteristic, one’s capacity for empathic concern dictates how much one cares about others. Those who score high in empathic concern, according to past research, are more likely to return incorrect change to a cashier, let someone else ahead of them in line, carry a stranger’s belongings, give money to a homeless person, volunteer, donate to a charity, look after a friend’s pet or plant, or even live on a vegetarian diet. And what’s alarming, Konrath said, is that empathic concern has fallen more than any other aspect of empathy. Between 1979 and 2009, according to the new research, empathic concern dropped 48 percent.

Starting around a decade ago, scores in two key areas of empathy begin to tumble downward. According to the analysis, perspective-taking, often known as cognitive empathy — that is, the ability to think about how someone else might feel — is declining. But even more troubling, Konrath noted, is the drop-off the researchers have charted in empathic concern, often known as emotional empathy. This is the ability to exhibit an emotional response to someone’s else’s distress.

Initially, they found little shift. “It’s looking sort of flat, or no real pattern, up until 2000,” Konrath said. “And then there’s this sudden, sharp drop.”

That link between empathy and narcissism drove the Michigan study. In recent years, some psychologists, including Konrath, have offered evidence that narcissism may be on the rise, leading to a debate about whether that’s actually happening and, if so, whether it’s a problem. A certain amount of narcissism is healthy, psychologists point out, helping give people the confidence to compete, succeed, or lead others. But it can also tip the other way, creating a world of increased self-absorption. Konrath and her coauthors, hoping to get to the bottom of this debate, set out to measure how empathy had changed over time. If narcissism was truly on the rise, they postulated, then empathy had to be in decline. They began to analyze the results of 72 different surveys, given to almost 14,000 college students, beginning in 1979, charting how the students answered the same questions over time.

Perhaps, others argue, the problem is the advent of 24-hour cable and Internet news; young people today have been inundated with news to the point that they cannot care anymore. The oil spill in Louisiana this week, the flood in Pakistan next week — the tragedies all run together, making it harder to care in any sort of sustained way. Parenting could also be at fault, Konrath speculated. Perhaps today’s less empathetic children were raised by more narcissistic parents. Or the problem could be a hypercompetitive world in which everyone is trying to get into the best schools, get ahead, get more.

It’s possible, some psychologists argue, that people haven’t changed so much as the world around us has. Innately, they suggest, young people today still care as much as they once did. But at a time when jobs are scarce, the economy is sputtering, our politics are filled with anger, and people often feel powerless to address the problems in their own lives — much less affect big issues like climate change — perhaps young Americans are just evolving to focus on what matters most: their own tiny worlds.

“I’d be extremely surprised if it turns out that students were now less capable of caring for other people — their friends, romantic partners, family, or pets,” Batson said. “The idea that they’re less capable of caring than they were 20 years ago — that just seems unlikely. I don’t think we change like that. But our situation may have changed. One may feel pressure to pull back on the scope of one’s concern. Pull it back and say, ‘I’ve got to deal with the needs that are pressing right here.’ ”

Konrath also warns that it’s hard to know if the problem is as acute as the study shows. College students aren’t a representative slice of America. In order to know if empathy is truly declining, Konrath said, she would need to run a study that captures the full picture of the populace — research that her group has already started. And though the findings aren’t published yet, Konrath said, the early indications are that the national findings support what they have already found. “People who were born in the ’80s or later,” she said, “are lowest in empathy, regardless of whether they have a college degree or not.”

Still, she is trying to stay upbeat about the present and the future. If empathy can go down, she said, it can also go up. It’s malleable. But still there’s reason for concern, just knowing how a lack of empathy can affect society.

In recent years, W. Keith Campbell, Twenge’s coauthor and a professor of psychology at the University of Georgia, has run a series of experiments where he places four people in charge of forestry companies harvesting an imaginary 200-hectare forest. He gives them permission to cut down 10 hectares a year, stipulating that 10 percent will grow back. The question before the participants is: Will they limit their short-term gains for the long-term good of the group? Or will they cut down as many trees as possible, thereby exhausting the resource for everyone much faster?

The narcissists — those focused primarily on themselves — always do well, Campbell said, harvesting more trees than the others in the group. But soon enough, the system is destroyed and everyone is worse off.

“So if you have a society where a lot of people are narcissistic, the whole thing blows up,” he said. “It implodes.”

Freelance writer Keith O’Brien, winner of the Casey Medal for Meritorious Journalism, is a former staff writer for the Globe. E-mail him at keith@keithob.com.

© Copyright 2010 Globe Newspaper Company.