The Importance of Evidence and Sources in Decision Making

(Illustrative Only)

People hold many opinions, but not all are grounded in evidence or scientific reasoning. Media and everyday conversations often highlight viewpoints shaped more by personality or perceived authority than by reliable data. Because of this, when presenting an argument—whether in the workplace or in an academic setting—it is important to support claims with credible sources and well-constructed logic.

Citing sources can strengthen credibility, but it is not enough on its own. What truly matters is engaging with the broader body of knowledge—examining different perspectives, understanding others’ findings, and incorporating sound evidence into your reasoning. Simply selecting information that confirms existing beliefs while ignoring conflicting evidence can lead to flawed conclusions, even if sources are cited.

A strong, persuasive argument requires open-mindedness, critical evaluation of information, and a willingness to consider opposing viewpoints. By thoughtfully exploring and sharing evidence, discussions become more meaningful and conclusions more reliable. 

Evidence-based scientific thinking and decision-making in everyday life

• Everyday decision-making depends on a mix of cognitive skills, attitudes, and motivations, not just factual knowledge
• Curiosity and positive attitudes toward science increase engagement with information and improve evaluation of evidence quality
• Social authority strongly influences what people consider credible, sometimes outweighing actual evidence quality
• Individual differences (e.g., personality, beliefs, thinking styles) shape how people interpret and use scientific information
• Open-mindedness and intellectual humility help reduce bias and improve the ability to assess conflicting information

Dawson, C., Julku, H., Pihlajamäki, M., Kaakinen, J. K., Schooler, J. W., & Simola, J. (2024). Evidence-based scientific thinking and decision-making in everyday life. Cognitive Research: Principles and Implications, 9, 50. https://doi.org/10.1186/s41235-024-00578-2