Voir Dire

Voir dire (Anglo-Norman French, roughly "to speak the truth") is a procedural device used in common-law courts to test, in advance, whether a prospective juror should be seated or whether a witness or piece of evidence is competent to be put before the trier of fact. The phrase has two distinct working meanings depending on jurisdiction.

In the United States, voir dire refers almost exclusively to the questioning of prospective jurors by the judge and counsel during jury selection. Lawyers probe for bias, prior knowledge of the parties, exposure to pretrial publicity, or views that would prevent impartial deliberation. Challenges fall into two categories: for cause (unlimited, requiring a stated reason) and peremptory (limited in number, no reason required). The Supreme Court constrained peremptory strikes in Batson v. Kentucky, 476 U.S. 79 (1986), holding that prosecutors may not strike jurors on the basis of race; J.E.B. v. Alabama ex rel. T.B., 511 U.S. 127 (1994) extended the rule to gender.

In England, Wales, Canada, and other Commonwealth jurisdictions, the term more commonly denotes a "trial within a trial" — a hearing, usually conducted in the jury's absence, in which the judge decides preliminary questions such as the admissibility of a confession, the competence of a child witness, or whether an expert is qualified. Juror questioning is far more restricted than in the U.S.; in England and Wales, peremptory challenges were abolished by the Criminal Justice Act 1988.

For researchers, voir dire is relevant beyond domestic criminal procedure: international criminal tribunals such as the ICTY and ICC borrow elements of the practice when assessing witness competence and the admissibility of contested evidence, though without jury selection because these tribunals sit without juries. Comparative scholars often use voir dire as a lens for studying how legal systems balance procedural fairness, efficiency, and public confidence in adjudication.