Which of the following describes expert testimony?

Expert testimony refers to the formal statements made by professionals who possess specialized knowledge or expertise in a particular field relevant to a case. This type of testimony is grounded in the witness’s education, training, and experience, allowing them to provide insights that can help the court understand complex issues that may be outside the realm of typical knowledge.

The role of expert testimony is to aid the decision-making process by presenting evidence and opinion that is informed by research, standards, and practice within the profession. This makes it especially valuable in cases involving technical, scientific, or specific professional issues, where the layperson may lack sufficient understanding to make informed conclusions.

In contrast, personal opinions of a witness are not considered expert testimony because they lack the necessary foundation of professional knowledge. Visual demonstrations may support expert testimony but do not in themselves constitute the testimony. Historical accounts from past cases might inform a case but are not categorized as expert testimony unless they are integrated with the expert's analysis or opinion.