Kan. Stat. § 60-441 : — PROCEDURE, CIVILRULES OF EVIDENCE —441 - Evidence to test a verdict or indictment

Upon an inquiry as to the validity of a verdict or an indictment no evidence shall be received to show the effect of any statement, conduct, event or condition upon the mind of a juror as influencing him or her to assent to or dissent from the verdict or indictment or concerning the mental processes by which it was determined.