Which statement best describes the standard under Rule 702 for admissibility of expert testimony?

• A. The opinion must be based on common sense and be helpful to the fact-finder.
• B. The opinion must be based on specialized knowledge and be helpful to the trier of fact.
• C. The opinion may be based on speculation.
• D. The opinion must be presented only in writing.

Answer: (B)

Rule 702 requires that expert testimony be grounded in specialized knowledge and be capable of aiding the trier of fact. This means the opinion comes from training, education, or experience in a specific field and rests on methods and data appropriate to that field. The judge must find that the testimony will help the jury or judge understand the evidence or determine a fact in issue, rather than merely reflecting common sense or personal belief. It also implies the expert’s conclusions are based on reliable methods and data, not speculation. Oral testimony is permitted and admissible when these standards are met.