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Measurement in the social sciences has been characterized by deficient justification and underdeveloped conceptual theories. Instruments supposed to measure the same measurand typically do not provide comparable measurements. From the perspective of metrological traceability, the state of affairs has thus been unsatisfactory. Today, better instruments can be developed as psychometrics provides tools for invariant measurement (Rasch measurement theory), where measurements are justifiable, linear, and sample-independent. Different instruments can be linked to a common metric of the measurand by means of co-calibration of item parameters. Such linkages, referred to as crosswalks, are an important and practically useful contribution to traceability, when common references have not been developed, yet. The measurement of dependence on tobacco and/or nicotine-containing products through self-report instruments illustrates the limitations of traditional measurement, how they can be overcome by new instrument development, and how a network of crosswalks with existing legacy instruments can be established.
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Reduced Risk Products ("RRPs”) is the term we use to refer to products that present, are likely to present, or have the potential to present less risk of harm to smokers who switch to these products versus continuing smoking. PMI has a range of RRPs in various stages of development, scientific assessment and commercialization. All of our RRPs are smoke-free products that deliver nicotine with far lower quantities of harmful and potentially harmful constituents than found in cigarette smoke.