Walking around my neighborhood in the evening, I am hit by the smells of summer: fresh-cut grass, hamburgers grilling and a hint of swimming pool chlorine. These are also the smells of summers from my adolescence, and they remind me of Friday evenings at the community pool with my friends and our families gathered around picnic tables between swims. The memories always brings a smile to my face.
As a social psychologist, I shouldn’t feel surprised to experience this warm glow. My research focuses on nostalgia – a sentimental longing for treasured moments in our personal pasts – and how nostalgia is linked to our well-being and feelings of connection with others.
Triggered by sensory stimuli such as music, scents and foods, nostalgia has the power to mentally transport us back in time. This might be to important occasions, to moments of triumph and – importantly – moments revolving around close family and friends and other important people in our lives.
As it turns out, this experience is good for us.
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How the concept of nostalgia evolved
For centuries, nostalgia was considered unhealthy.
In the 1600s, a Swiss medical student named Johannes Hofer studied mercenaries in the Italian and French lowlands who longed desperately for their mountain homelands. Witnessing their weeping and despondency, he coined the term nostalgia and attributed it to a brain disease. Other thinkers of the time echoed this view, which persisted through the 18th and 19th centuries.
However, early thinkers made an error: They assumed that nostalgia was causing unpleasant symptoms. It may have been the reverse. Unpleasant experiences, such as loneliness and grief, can arouse nostalgia, which can then help people cope more effectively with these hardships.
Today, researchers view nostalgia as a predominantly positive, albeit bittersweet, emotional experience that serves as a source of psychological well-being. Importantly, this view has been supported by scientific research.
How nostalgia inspires connection and belonging
Nostalgia provides many benefits. It enhances feelings of optimism and inspiration and makes people view themselves more positively. When people feel nostalgic, they feel a greater sense that their lives are meaningful.
The social benefits of nostalgia are particularly well supported. Nostalgia increases empathy and the willingness of people to give to those around them, such as volunteering for community events and donating to charities.
Nostalgia also makes people feel more socially connected to their loved ones by enhancing feelings that they are loved by, connected to, protected by and trusting of others. Nostalgia helps people feel more secure in their close relationships and enhances relationship satisfaction.
While nostalgia is a universal experience, it is also deeply personal. The moments for which we are each nostalgic and the stimuli that might trigger our nostalgic memories can vary from one person to the next depending on the experiences that each of us have. But people within the same culture may find similar stimuli to be nostalgic for them. In a 2013 study, for instance, my team found that American participants rated pumpkin pie spice as the most nostalgia-evoking scent out of a variety of options.
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The nostalgic power of scents and foods
In 1922, the French novelist Marcel Proust wrote about the strength of scents and foods to elicit nostalgia. He vividly described how the experience of smelling and eating a tea-soaked cake mentally transported him back to childhood experiences with his aunt in her home and village. This sort of experience is now often referred to as the Proust effect.
Science has confirmed what Proust described. Our olfactory system, the sensory system responsible for our sense of smell, is closely linked to brain structures associated with emotions and autobiographical memory. Smells combine with tastes to create our perception of flavor.
Foods also tend to be central to social gatherings, making them easily associated with these memories. For instance, a summer barbecue might feel incomplete to some without slices of juicy watermelon. And homemade pumpkin pie may be an essential dessert at many Thanksgiving tables. The watermelon or pie may then serve as what are known in social psychology as social surrogates, foods that serve as stand-ins for valued relationships due to their inclusion at past occasions with loved ones.
My research team and I wanted to know how people benefited from feeling nostalgic when they encountered the scents and foods of their pasts. We began in 2011 by exposing study participants to 33 scents and chose 12 of them for our study. Participants rated some scents, such as pumpkin pie spice and baby powder, as highly evocative of nostalgia, while rating others – such as money and cappuccino –as less evocative.
Those who experienced more nostalgia when smelling the scents experienced greater positive emotions, greater self-esteem, greater feelings of connection to their past selves, greater optimism, greater feelings of social connectedness and a greater sense that life is meaningful.
We came to similar conclusions when we studied nostalgia for foods. Foods seemed to be more strongly linked to nostalgia than either scents or music when comparing the amount of nostalgia our participants experienced for foods to what previous research participants experienced for scents and songs. More recently, we found that nostalgic foods are comforting and that people find nostalgic foods comforting because those nostalgic foods remind them of important or meaningful moments with their loved ones.
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Balancing benefits and trade-offs
Although nostalgia can be associated with foods that should be eaten only in moderation – such as burgers and cookies – there are other ways to channel our nostalgia through foods.
We can have nostalgia with healthy foods. For instance, orange slices remind me of halftime at childhood soccer matches. And many people, including our research participants, feel intense nostalgia around watermelon. Other researchers have found that tofu is a nostalgic food for Chinese participants.
But when nostalgia does involve consumption of unhealthy foods, there are still other ways to experience it without the health trade-offs. We found that participants experienced the benefits of food-evoked nostalgia just from imagining and writing about the foods – no consumption necessary. Other researchers have found that drawing comforting foods can enhance well-being. Even consuming less healthy foods more mindfully helps people enjoy their food while reducing their caloric consumption.
Once seen as detrimental to our health, nostalgia provides us with an opportunity to reap numerous rewards. With nostalgic foods, we might be able to nourish both our bodies and our psychological health.
