What is typically the focus of primary evidence?

The focus of primary evidence is on direct experimental investigations. This type of evidence arises from original research where the data is collected firsthand rather than being derived from previous studies. Primary evidence is crucial because it provides the foundational information needed to understand a topic, validate theories, and form new hypotheses. The experiments and observations made in primary research contribute to advancing knowledge by offering insights based on real-world data and findings.

In contrast, studies that review past research aggregate existing information but do not contribute new data to the field; qualitative assessments analyze literature without generating new experimental results, and theoretical discussions often provide context or perspectives rather than empirical evidence. Thus, primary evidence serves as a critical component in the hierarchy of evidence, enabling researchers and practitioners to base decisions on solid and direct findings.