FEDERAL RULES OF EVIDENCE

ARTICLE VI.  WITNESSES

Rule 606. Competency of Juror as Witness

(a) At the trial.

A member of the jury may not testify as a witness before that jury in the
trial of the case in which the juror is sitting. If the juror is called so to testify,
the opposing party shall be afforded an opportunity to object out of the
presence of the jury.

(b) Inquiry into validity of verdict or indictment.

Upon an inquiry into the validity of a verdict or indictment, a juror may not
testify as to any matter or statement occurring during the course of the
jury's deliberations or to the effect of anything upon that or any other juror's
mind or emotions as influencing the juror to assent to or dissent from the
verdict or indictment or concerning the juror's mental processes in
connection therewith, except that a juror may testify on the question
whether extraneous prejudicial information was improperly brought to the
jury's attention or whether any outside influence was improperly brought to
bear upon any juror. Nor may a juror's affidavit or evidence of any
statement by the juror concerning a matter about which the juror would be
precluded from testifying be received for these purposes.

Federal Rules of Evidence: Rule 606. Competency of Juror as Witness Notes
 

Rule 403 Notes
Rule 403. Exclusion of Relevant Evidence on Grounds of Prejudice, Confusion, or Waste of Time-LII  
Rule 403 Legal Information Institute-LII
Rule 403 Notes Legal Information Institute-LII
Rule 409. Payment of Medical and Similar Expenses-LII
Rule 410. Inadmissibility of Pleas, Plea Discussions, and Related Statements-LII
Law Students  MM
Federal Rules of Evidence: Rule 413: Notes
Federal Rules of Evidence: Rule 415.  Evidence of Similar Acts in Civil Cases
Concerning Sexual Assault or Child Molestation  

Federal Rules of Evidence: Rule 606. Competency of Juror as Witness
Rule 410. Inadmissibility of Pleas, Plea Discussions, and Related Statements