Polarization in research: What is it, why is it problematic, and how can it be addressed?

Background: Polarized research has become a problem for the trustworthiness and applicability of scientific results. Accordingly, this paper addresses three key questions: 1) What is polarization in scientific research? 2) Why is such polarization problematic? 3) How can the problem be addressed?Methods: The first question is addressed by describing how the polarization has been characterized in the literature and by analysing an example before assessing existing definitions and elaborating a definition of polarization. The second question is answered by describing challenges with polarization found in the literature. The third question is addressed by investigating different explanations for and relevant mechanisms behind polarization in research, such as psychological, structural, epistemic and ontological, evaluative, and social-constructionist explanations. Moreover, several approaches from the philosophy of science are investigated.Results: Polarization in research is characterized by opposing and incommensurable positions that tend to stem from differences in basic values, and that are used to define, differentiate, bolster, and demarcate between groups and for reinforcing their identity. The problem with polarization is that it violates a broad range of basic norms in science, and hampers scientific progress, represents large opportunity costs, undermines trust in science and, subsequently that it undercuts the application of scientific results as well as future funding. There are many potential measures to reduce polarization. However, there are no simple solutions, as polarization is a complex phenomenon deeply rooted in basic human characteristics.Conclusion: Polarization is a ubiquitous phenomenon and a basic challenge for scientific research. It is crucial to increase the awareness of polarization, and a clear definition is key to study and address the problem. However, while there are many ways to actively address the problem of polarization in scientific research, there are no easy solutions. More research is needed to move from what we can do to what we should do.