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Rule 701. Opinion Testimony by Lay Witnesses.
If the witness is not testifying as an expert, his testimony in the form of opinions or inferences may be admitted if it (a) is rationally based on the perception of the witness and (b) will assist in understanding the witness' testimony or in determining a fact in issue.
Rule 702. Testimony by Experts.
If scientific, technical, or other specialized knowledge will assist the trier of fact to understand the evidence or to determine a fact in issue, a witness qualified as an expert by knowledge, skill, experience, training, or education, may testify thereto in the form of an opinion or otherwise.
Rule 703. Bases of Opinion Testimony by Experts.
The facts or data in the particular case upon which an expert bases an opinion or inference may be those perceived by or made known to him at or before the hearing. If of a type reasonably relied upon by experts in the particular field in forming opinions or inferences upon the subject, the facts or data need not be admissible in evidence.
Rule 704. Opinion on Ultimate Issue.
Testimony in the form of an opinion or inference otherwise admissible is not objectionable because it embraces an ultimate issue to be decided by the trier of fact.
Rule 705. Disclosure of Facts or Data Underlying Expert Opinion; Hypotheses not Necessary.
The expert may testify in terms of opinion or inference and give his reasons therefor without prior disclosure of the underlying facts or data, unless the court requires otherwise. The expert may in any event be required to disclose the underlying facts or data on cross-examination. Questions calling for the opinion of an expert witness need not be hypothetical in form unless in the judge's discretion it is so required.
Rule 706. Court Appointed Experts [Not Adopted]
NJ Evidence Table of Contents
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