Most of us are subjected to insults, sarcastic comments or bad feedback in our everyday lives. But we weren’t built to deal with torrents of criticism.

As children we are often told that sticks and stones can break bones, but words can never hurt. Yet with the benefit of experience, adults understand that this old proverb is far from true – while physical injuries can take a matter of weeks to heal, negative comments can scar us for a lifetime.

Whether it’s criticism calmly dispensed by a teacher at school, or a cruel comment hurled in the heat of an argument with a friend or lover, we tend to remember criticism far better than positive comments, due to a phenomenon called the negativity bias.

In fact, a whole host of complex effects can be explained by this bias, which is the universal tendency for negative emotions to affect us more strongly than positive ones. It causes us to pay special attention to threats and exaggerate the dangers, according to Roy Baumeister, a social psychologist at the University of Queensland and co-author of The Power of Bad: And How to Overcome It.

While a focus on the darker side of the world around us may sound like a depressing prospect, it has helped humans overcome everything from natural disasters to plagues and wars by being better prepared to deal with them (although there is evidence that optimism can also help to protect us from the stress of extreme situations). The human brain evolved to protect our bodies and keep us alive, and has three warning systems to deal with new dangers. There’s the ancient basal ganglia system that controls our fight or flight response, the limbic system which triggers emotions in response to threats to help us understand dangers, and the more modern pre-frontal cortex, which enables us to think logically in the face of threats.

“Our ancestors who had that [negative] bias were more likely to survive,” says Baumeister. Humans are hard-wired to look for threats and at just eight months, babies will turn more urgently to look at an image of a snake than a friendlier frog. By age five, they have learned to prioritise an angry or fearful face over a happy one.

Baumeister says focusing on problems first can be a good strategy. “First get rid of the negatives and solve the problems. Essentially, stop the bleeding.” But, while honing in on the bad may keep us safe in extreme situations, the negativity bias can prove unhelpful on a day-to-day basis. Baumeister believes that until we learn how to override the disproportionate impact of the negative, it distorts our view of the world and how we respond to it.

For example, life tends to look gloomy between the pages of a newspaper. Journalists are often accused of chasing bad news because it sells papers and attracts viewers. This may be partly true, but researchers have shown that readers are naturally drawn to calamitous tales and are more likely to share them with others. Rumours about potential dangers – even if they are unlikely – spread among people far more readily than rumours that could be beneficial.

In one study, scientists at McGill University in Canada, used eye-tracking technology to study which news articles volunteers paid most attention to. They found that people often chose stories about corruption, set-backs, hypocrisy and other bad news, in preference to positive or neutral stories. People who were more interested in current affairs and politics were particularly likely to choose the bad news, and yet when asked, these people said they preferred good news.

What we read and watch on the news can heighten our fears. For example, our fear of terrorism is pronounced even though the number of people killed by terrorist groups in the past 20 years in the US is smaller than the number of Americans who have died in their bathtubs during the same period, Baumeister explains in his book.

While worrying about a hypothetical but horrific situation can make us fearful, just one small bad experience can have a disproportionate impact on our whole day. Randy Larsen, professor of psychological and brain sciences at Washington University in St Louis, reviewed evidence suggesting negative emotions last longer than happy ones. He found we tend to spend more time thinking about bad events than good ones, perhaps helping to explain why embarrassing moments or critical comments can haunt us for years.

It can be hard not to dwell on hurtful comments from a lover, family member or a friend. “I would think negative comments from the people we love and trust would have more impact than those from strangers,” says Baumeister. This is partly because we have expectations of how our friends and family should behave towards us.

In some cases, negative remarks from people we love can lead to long-lasting mental wounds and resentment that can cause relationships to break down. Researchers at the University of Kentucky in the US found relationships are seldom saved when partners ignore relationship problems to remain “passively loyal”. “It is not so much the good, constructive things that partners do or do not do for one another that determines whether a relationship works as it is the destructive things that they do or not do in reaction to problems,” they said.

Another study, which followed couples for more than 10 years……………………………


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