One of the most crucial aspects of the arbitrator's role is neutrality. For arbitration proceedings to achieve a fair resolution of disputes, the arbitrator must make his decision without bias. All jurisdictions allow vacation of arbitration awards where there is "evident partiality" on the part of an arbitrator appointed as neutral. The application of this "evident partiality" test, however, has yielded widely varying results. Moreover, most state and federal courts apply a lower standard of impartiality to arbitrators than they apply to judges. The reason for this lower standard is that the parties consented to a less than perfect tribunal when they consented to an arbitration.
Elizabeth A. Murphy,
Standards of Arbitrator Impartiality: How Impartial Must They Be - Lifecare International, Inc. v. CD Medical, Inc.,
1996 J. Disp. Resol.
Available at: https://scholarship.law.missouri.edu/jdr/vol1996/iss2/7