Use of perceived weights for scale familiarization in a PROP taster classification procedure

Abstract

AbstractLabeled magnitude scales are commonly used in sensory testing especially in PROP‐tasting studies. Frequently, subjects are asked to complete a familiarization task before the test begins to check if they understand the scale and can use it effectively. A variety of familiarization tasks have been used, but validation studies are sparse. In the present study, subjects assessed the “heaviness” of five weights held in the hand and were then classified by PROP status using a standard screening protocol with NaCl as a reference standard. Results showed that perceived heaviness increased with increasing weight, and this was independent of PROP status. When the mean of the two highest weights was used as the reference standard in the PROP screening protocol, subjects were classified similarly. Weight estimation is effective as a general familiarization task and can also be used as an external (nontaste) standard in PROP screening.Practical ApplicationsSubjects benefit from practice using labeled magnitude scales before they are asked to rate samples or products. The weight estimation task described here is easy for subjects to understand and use and quick to administer. This procedure can be used as a general familiarization task in sensory testing and as part of a PROP screening procedure.