Documento

The Value of Positive Emotions
The emerging science of positive psychology is coming to understand why it’s good to feel good

Barbara L. Fredrickson

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ack in the 1930s some young Catholic nuns were asked to write short, personal essays about their lives. They described edifying events in their childhood, the schools they attended, their religious experiences and the influences that ledthem to the convent. Although the essays may have been initially used to assess each nun’s career path, the documents were eventually archived and largely forgotten. More than 60 years later the nuns’ writings surfaced again when three psychologists at the University of Kentucky reviewed the essays as part of a larger study on aging and Alzheimer’s disease. Deborah Danner, David Snowdon andWallace Friesen read the nun’s biographical sketches and scored them for positive emotional content, recording instances of happiness, interest, love and hope. What they found was remarkable: The nuns who expressed the most positive emotions lived up to 10 years longer than those who expressed the fewest. This gain in life expectancy is considerably larger than the gain achieved by those who quitsmoking. The nun study is not an isolated case. Several other scientists have found that people who feel good live longer. But why would this be so? Some answers are emerging from the new field of positive psychology. This branch of psychological science surfaced about five years ago, as the brainchild of Martin E. P. Seligman, then president of the American
Barbara L. Fredrickson is the director ofthe Positive Emotions and Psychophysiology Laboratory at the University of Michigan. In 2000 she won the Templeton Prize in Positive Psychology. Address: 3006 East Hall, 525 East University Avenue, University of Michigan, Ann Arbor, MI 48109–1109. Internet: blf@umich.edu 330 American Scientist, Volume 91

Psychological Association (APA). Like many psychologists, Seligman had devoted much of hisresearch career to studying mental illness. He coined the phrase learned helplessness to describe how hopelessness and other negative thoughts can spiral down into clinical depression. At the start of his term as APA president, Seligman took stock of the field of psychology, noting its significant advances in curing ills. In 1947, none of the major mental illnesses were treatable, whereas today 16are treatable by psychotherapy, psychopharmacology or both. Although psychology had become proficient at rescuing people from various mental illnesses, it had virtually no scientifically sound tools for helping people to reach their higher ground, to thrive and flourish. Seligman aimed to correct this imbalance when he called for a “positive psychology.” With the help of psychologist MihalyCsikszentmihalyi—who originated the concept of “flow” to describe peak motivational experiences—Seligman culled the field for scientists whose work might be described as investigating “that which makes life worth living.” This is how many research psychologists, myself included, were drawn to positive psychology. My own background is in the study of emotions. For more than a dozen years, I’ve beenstudying the positive emotions—joy, contentment, gratitude and love—to shed light on their evolved adaptive significance. Among scientists who study emotions, this is a rare specialty. Far more emotion researchers have devoted their careers to studying negative emotions, such as anger, anxiety and sadness. The study of optimism and positive emotions was seen by

some as a frivolous pursuit. But thepositive psychology movement is changing that. Many psychologists have now begun to explore the largely uncharted terrain of human strengths and the sources of happiness. The new discoveries generated by positive psychology hold the promise of improving individual and collective functioning, psychological well-being and physical health. But to harness the power of positive psychology, we need to...