VALIDITY OF PORTION-SIZE MEASUREMENT AIDS - A REVIEW

A review of research studies that focus on the validity of portion-siz e measurement aids (PSMAs) was undertaken because guidelines for the u se of PSMAs in studies of food intake have not been developed. Also, t he accuracy of food quantity estimates may greatly influence the quali ty of dietary intake data. Generally, the review indicated that differ ences between the food quantity estimates obtained from different PSMA s were not statistically significant. Research on PSMA accuracy was la cking in several areas. Additional information is needed on the validi ty of PSMAs particularly as it relates to PSMA use by different sociod emographic groups. Little research has focused on the specific effects that PSMAs have on quantity estimates or on subject perceptions of PS MA use. Improved reporting of PSMAs in the literature is also needed. Future research should be directed toward these issues so that PSMA gu idelines can be developed. Until there is a more complete research bas e, it is not possible at this time to establish guidelines for use of PSMAs in clinical practice or in research settings.