Plaintiff's counsel informed the trial court of counsel's reasonable belief that plaintiff had diminished capacity. Under Rule 4:26-2(a)(4), a court may appoint a guardian ad litem if there is good cause to believe that a party lacks the mental capacity needed to participate in the litigation. Based upon the guardian ad litem's investigation or other information, the court may give the guardian ad litem the power to make specific decision(s) needed in the case if it finds clear and convincing evidence that the party is mentally incapable of making those decision(s). The Appellate Division disapproves older cases suggesting the court had to meet Rule 4:86's standard for appointing a guardian of the person or property. As the court found plaintiff lacked the mental capacity to decide whether to try or settle the case, the guardian ad litem could negotiate a settlement which the court properly found was fair and reasonable under Rule 4:44.