In evaluating health research, which practice strengthens credibility?

• A. They rely on a single case without theoretical grounding.
• B. They ignore rival explanations.
• C. They demonstrate coherence of findings with theory, test rival explanations, and use triangulation.
• D. They publish results without peer review.

Answer: (C)

The main idea is that credibility in health research grows when findings fit well with existing theory, actively test competing explanations, and are supported by multiple lines of evidence through triangulation. When results align with what theory would predict, it increases plausibility and shows the work isn’t just a one-off observation. Testing rival explanations means researchers explicitly consider other reasons the data could look the way it does and demonstrate why those alternatives are less plausible given the evidence. Triangulation strengthens trust by confirming findings across different methods, data sources, or researchers, so a result isn’t dependent on a single approach.

Relying on a single case without theoretical grounding invites idiosyncrasies and weak generalizability. Ignoring rival explanations leaves room for bias and untested interpretations. Publishing without peer review misses critical scrutiny that helps catch errors and overreach.