This article explores what happens when scientific research produces a null, negative, or inconclusive result—and why those findings are often harder to publish than studies that produce a clear positive result. Nature follows researchers who have encountered unexpected results and examines the broader problem of publication bias in scientific research.

The problem is bigger than whether one study gets published. When positive findings are more likely to make it into journals while null results disappear into file drawers, the published literature can give researchers and the public a distorted picture of what the evidence actually shows. The article looks at several efforts to address this problem, including changes to publishing practices and greater emphasis on preregistration and study designs that commit researchers to a question before they know the outcome.

The bigger question is what happens to science when we only see the studies that “work.” Null results are not failures—they can challenge assumptions, prevent researchers from pursuing dead ends, and provide an important part of the evidence needed to understand what is actually true. A healthier scientific system needs to make room for findings that contradict expectations, not just findings that confirm them.

https://www.nature.com/articles/d41586-024-02383-9