Are experts and lay witnesses allowed to express their opinions in testimony?

In legal testimony, expert witnesses are specifically qualified to provide opinions based on their specialized knowledge, training, or experience in a particular field. Unlike lay witnesses, who can only testify to facts they personally observed or experienced, expert witnesses can offer their opinions and interpretations of information related to their area of expertise. This distinction is crucial because it underscores the role of expert testimony in helping judges and juries understand complex subjects that fall outside general knowledge.

Moreover, expert opinions can be critical in influencing the outcome of a case, as they can clarify technical issues and provide insights that are integral to making informed decisions. In contrast, lay witnesses are usually restricted to factual observations without offering personal opinions or conclusions drawn from their experiences, thus maintaining the integrity of the evidence presented in court.