What details must an expert witness report include?

The correct answer emphasizes that an expert witness report must include the expert's opinion and the factual basis for that opinion. This requirement is crucial because the purpose of an expert witness is to provide the court with specialized knowledge that assists in understanding complex issues. The opinion itself needs to be well-founded in reliable methods, data, or experience, ensuring that it can withstand scrutiny during legal proceedings.

In presenting their opinion, the expert should outline the data or facts that led them to their conclusions, making it clear how their expertise informs their viewpoint. This thorough explanation aids the court in assessing the credibility and relevance of the expert testimony, fostering a clearer understanding of the issues at hand.

Including the expert's opinion and the underlying basis is fundamental as it supports the integrity and reliability of the testimony, ensuring that it can provide valuable insights relevant to the case.