In Soliz v. Saenz, 779 S.W.2d 929, 934 (Tex. App.--Corpus Christi 1989, writ denied), the appellant contended that these rules violate the Due Process Clause of the Fourteenth Amendment and the right to a fair and impartial jury under the Texas Constitution. Noting that the rules provide for a hearing, the court concluded that the need to protect the "jury's delicate deliberative process" warranted the rules' restriction on juror testimony and did not deprive the litigant of a meaningful opportunity to be heard and did not violate due process. Soliz, 779 S.W.2d at 934-35. The court recognized that the rules were adopted in an attempt to promote the "purity and efficiency' of the jury system," and therefore did not deprive the appellants of a fair and impartial trial by jury. Id. at 935.