A more thorough explanation:

Definition: Expert-reliance materials are facts, documents, and other sources that provide data or information to an expert witness. These materials are often used in legal cases to support the expert's opinion.

Examples:

• A medical report that provides information about a patient's injuries
• A scientific study that supports the expert's opinion on a particular topic
• A financial statement that provides data about a company's profits and losses

These examples illustrate how expert-reliance materials can be used to support an expert's opinion. For example, in a personal injury case, a medical report can provide important information about the extent of a person's injuries and the treatment they require. This information can then be used by a medical expert to provide an opinion on the person's prognosis and the impact of their injuries on their life.