Several people have criticized the level of training required to perform behavior modification procedures, especially those that are restrictive or use aversives, aversion therapy, or punishment protocols. Some desire to limit such restrictive procedures only to licensed psychologists or licensed counselors. Once licensed for this group, post-licensed certification in behavior modification is sought to show scope of competence in the area through groups like the World Association for Behavior Analysis. Still others desire to create an independent practice of behavior analysis through licensure to offer consumers choices between proven techniques and unproven ones (see Professional practice of behavior analysis). Level of training and consumer protection remain of critical importance in applied behavior analysis and behavior modification.