How should authors handle negative findings or null results in rodent studies?

• A. Publish them transparently, with sufficient detail on methods and power; discuss potential reasons and implications, and consider publication as part of reducing bias.
• B. Only report if significant after multiple testing.
• C. Do not report them.
• D. Discuss but only in the context of significant results.

Answer: (D)

Publishing negative findings openly is essential in rodent research to prevent bias and build a accurate, cumulative understanding. When a study yields a null result, report it with enough methodological detail and a clear power analysis so readers can judge the precision and limits of the finding. Include what was planned, what was actually done, and any deviations from the protocol, so others know the context in which the null result occurred.

Explain why the result might have occurred: lack of power, measurement sensitivity, species or strain differences, dose or timing issues, or true absence of an effect. Discuss these possibilities honestly and outline implications for future work. This transparency helps others interpret the result, informs meta-analyses, reduces wasted effort, and improves study design in subsequent research.

Choice practices that focus only on significant findings or that omit negative results create bias and mislead the field. Reporting negative results with rigor and context, alongside significant findings, yields a more reliable scientific record and supports better decision-making in experimental planning and policy.

If helpful, reference guidelines like ARRIVE that promote complete and transparent reporting in animal research, reinforcing the habit of documenting and discussing null results rather than concealing them.