Two studies explore some of the developmental roots of depression in childhood and adolescence.
In the first study, published in the journal Clinical Psychological Science, researchers focused on depressive rumination, or the relentless focus on what has gone wrong or will go wrong, coupled with an inability to see a solution to these overwhelming problems. It’s no surprise that rumination has a strong connection to depression— in fact, studies show that some talk therapies can actually make depression worse by compelling people to focus on problems and their origins, rather than guiding them toward positive solutions on what to do about them.
They found that while much of brooding is influenced by environmental influences such as parenting and peers, virtually all of the connection between whether that brooding is associated with depression may be driven by genes. Someone who inherits a tendency to brood, in other words, also seems to inherit a tendency to become depressed.
That doesn’t mean that people who brood are necessarily at higher risk of depression. Because the research only looked at the twins at one point in time, the authors note that “it remains unclear from our results alone whether brooding is a risk factor for depression or is merely associated with depressed mood concurrently.” Since rumination can be re-directed and managed through cognitive behavioral therapy or other interventions, figuring out whether the tendency to brood can trigger depression could lead to early and effective treatments, which might actually prevent depression by stopping ruminating before it becomes engrained in brain circuitry.
Smith, who is also investigating some of the potential root causes of depression, reports in his study, published in Psychological Science, on an interesting connection between depression and people’s tendency to act without thinking when faced with strong emotion, known among psychologists as “urgency.” Although this behavior seems unrelated to depression, he and his colleagues found a surprising link.
“In numerous longitudinal studies, [urgency] has been shown to predict subsequent involvement in a range of rash, ill-advised behaviors, including problem drinking, pathological gambling, smoking, risky sex, drug use, binge eating, and others,” he says.
While the connections between either ruminative negative thoughts or impulsive behaviors and depression might seem obvious, such finer-grained understanding of how these tendencies may contribute to depression could lead to better ways of preventing an array of behavior problems.