Unspecified duo–trio tests can be as powerful as the specified 2-AFC: Effects of instructions and familiarization procedures on cognitive decision strategies

摘要: Abstract Using signal detection theory (SDT) and Thurstonian analysis, it has been possible in the food industry to make various business decisions such as reformulations cost reductions based on degree of consumer sensory discriminability by applying equivalence/difference testing. To achieve more efficient decision-making, is important investigate a theoretically operationally powerful discrimination test method. Cognitive decision strategies used methods largely determine relative power thus are theoretical practical significance. The goal this study was if procedures using constant-ref. duo–trio design enable untrained/naive subjects use 2-AFC strategy. Although previously showed operational superiority other unspecified methods, ‘comparison distance’ (COD) strategy which conventionally assumed for duo–trio, lacks theorized power. tested variables included two versions design, different familiarizations, instructions experimental session designs. Three iced tea samples were discriminated from reference 263 5 procedures. Results that able perform with presented twice, first middle (DTFM) procedure, even multiple pairs block after only tastings information constant-reference. preceded specified tetrad tests also potential another two-sequence design. These results suggest protocols can be an alternative triangle test.