Our Experiences Shape Our Baseline Mood

Everyone has times when they're more anxious or depressed than usual, but psychologists have found that a person's "usual" level of anxiety or depression--known as their "set point"--remains relatively stable over time.

The general consensus has been that our set point is based on genetic factors, but a new study to be published in Psychological Science looks at the way this set point for anxiety and depression is influenced by environmental factors. The study's authors conclude that life experiences may actually play a greater role than genes in establishing an individual's set point.

The study looked at data gathered over 5 or 6 years from more than 12,000 identical twins, long considered the gold standard in environment vs genetics studies due to their identical genetic material. Using statistical analysis, the researchers found that setpoints among the 10-year-old twins were very similar. But although their setpoints were stable (ie, they did not jump all over the map), they were not permanent, and as the twins grew older their setpoints became increasingly different, finally leveling out around age 60.

"Environmental experiences have memory and stay with us. What governs the emotional set point of adults is a mixture of genetic factors and the total aggregate of environmental experiences," says author Kenneth Kendler. "If you want to be happy in old age, live a good life."

Source: Medical News Today
Photo: Max Pixel

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