Arizona § 12-2203 Admissibility of expert opinion testimony

Arizona Statutes

§ 12-2203 — Admissibility of expert opinion testimony

Arizona § 12-2203

Title 12Arizona Revised Statutes

Ch. 13EVIDENCE

Art. 1Competency of Witnesses

This text of Arizona § 12-2203 (Admissibility of expert opinion testimony) is published on Counsel Stack Legal Research, covering Arizona primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook

Ariz. Rev. Stat. Ann. § 12-2203 (2026).

Text

A.In a civil or criminal action, only a qualified witness may offer expert opinion testimony regarding scientific, technical or other specialized knowledge and the testimony is admissible if the court determines that all of the following apply:

1.The witness is qualified to offer an opinion as an expert on the subject matter based on knowledge, skill, experience, training or education.

2.The opinion will assist the trier of fact in understanding the evidence or determining a fact in issue.

3.The opinion is based on sufficient facts and data.

4.The opinion is the product of reliable principles and methods.

5.The witness reliably applies the principles and methods to the facts of the case.

B.The court shall consider the following factors, if applicable, in determining whether th

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A. In a civil or criminal action, only a qualified witness may offer expert opinion testimony regarding scientific, technical or other specialized knowledge and the testimony is admissible if the court determines that all of the following apply:

1. The witness is qualified to offer an opinion as an expert on the subject matter based on knowledge, skill, experience, training or education.

2. The opinion will assist the trier of fact in understanding the evidence or determining a fact in issue.

3. The opinion is based on sufficient facts and data.

4. The opinion is the product of reliable principles and methods.

5. The witness reliably applies the principles and methods to the facts of the case.

B. The court shall consider the following factors, if applicable, in determining whether the expert testimony is admissible pursuant to subsection A:

1. Whether the expert opinion and its basis have been or can be tested.

2. Whether the expert opinion and its basis have been subjected to peer reviewed publications.

3. The known or potential rate of error of the expert opinion and its basis.

4. The degree to which the expert opinion and its basis are generally accepted in the scientific community.