How should a witness approach testifying about medical or scientific topics to ensure clarity for the jury?

• A. Use plain language, define terms, connect conclusions to observable facts, and base opinions on reliable data and accepted methods.
• B. Use complex jargon and assume jury understands.
• C. Only allow expert testimony with no explanation.
• D. Avoid explaining limitations of data.

Answer: (A)

Clear communication in medical or scientific testimony relies on speaking in plain language, defining technical terms, and showing exactly how conclusions follow from observable facts. When a witness bases opinions on reliable data and widely accepted methods, it helps the jury assess reliability and weight, making the expert’s reasoning transparent and credible. Connecting each conclusion to accessible evidence the jury can grasp prevents confusion and reduces misinterpretation. It’s also important to acknowledge relevant limitations or uncertainties, which strengthens trust and shows a balanced, methodical approach.

Using complex jargon or assuming jurors understand it can obscure meaning. Relying on testimony with no explanation leaves the jury without the needed context to evaluate credibility. Avoiding explanations of data limitations can overstate the strength of the evidence.