Clarifies how stimulus material is to be handled within the resequencing using a controlled vocabulary. Options: "include"=Include StimulusMaterial in resequencing without restriction; "preceding"=Attach each StimulusMaterial to the preceding question; "following"=Attach each StimulusMaterial to the question following it; and the default value of "within"=Resequencing occurs within each set of questions as delimited by StimulusMaterial