A recent study published in the journal Behaviour Research and Therapy provides evidence that people experiencing symptoms of depression hold genuinely pessimistic biases about future positive events, rather than simply viewing the world more realistically. The research suggests that while individuals with depression can update their beliefs when desirable things happen, these hopeful shifts tend to be fragile and easily reversed.

The study was designed to test whether the negative thinking patterns seen in depression reflect a genuine bias or just an absence of normal optimism. For decades, experts have debated the idea of depressive realism, a concept suggesting that depressed individuals actually see the world more accurately than healthy individuals, who tend to be overly optimistic. To test this, the researchers wanted to see how people predict everyday life events and how they adjust those expectations when real life proves them wrong.

“We know that depression involves a generally pessimistic outlook on life. Previous research has shown that people with high depressive symptoms tend to underestimate the likelihood of positive outcomes in their lives,” said study author Joe Maffly-Kipp, a postdoctoral fellow in the Mood & Individual Differences Lab (MIND Lab) at The Ohio State University Wexner Medical Center.