What type of testimony is referred to as 'opinion testimony'?

Opinion testimony refers specifically to statements made by individuals, typically expert witnesses, that express their beliefs or interpretations based on specialized knowledge, training, or experience in a particular field. In a legal context, this type of testimony is essential because it allows the court to understand complex issues that require expert analysis beyond the ordinary understanding of a layperson.

Expert witnesses provide opinion testimony based on inferences drawn from their expertise, which might include scientific, technical, or specialized knowledge. For example, a forensic scientist might offer an opinion about the significance of DNA evidence or a medical professional might analyze the implications of an injury based on their medical expertise. This type of testimony is critical for helping juries and judges make informed decisions when evaluating the case's merits.

The other choices do not fit the definition of opinion testimony as clearly. Testimony based on firsthand knowledge of facts typically involves recounting direct observations or experiences rather than offering subjective judgments. Testimony from jurors about trial experiences does not fall under expert opinion; it instead relates to their views on the trial process itself. General statements of fact represent objective realities rather than subjective interpretations or opinions, which differentiates them from opinion testimony.