This paper describes the 10 main features of the author's Pure Single-Source research employing the STAS measure. These features differ in almost every particular from the BehaviorScan area-testing system. It is, therefore, not very productive to compare the findings of the two systems; they're used for different purposes. The design of the STAS technique compensates for the influence of sales promotions, so that these do not have to be accounted for separately.