Idiographic duo-trio tests using a constant-reference based on preference of each consumer: Sample presentation...

Area of Science:

• Food Science
• Sensory Analysis
• Consumer Behavior

Background:

• Food industry reformulations require reliable consumer sensory perception measurements.
• Preferred-reference duo-trio tests improve discrimination but can increase task complexity and errors.

Purpose of the Study:

• To investigate the effects of different test instructions on sensory discrimination using the preference-reference duo-trio test.
• To compare the preference-reference duo-trio test with the balanced-reference duo-trio test.

Main Methods:

• A paired-preference test followed by 6 repeated preferred-reference duo-trio tests.
• Comparison with the analytical balanced-reference duo-trio method.
• Analysis of d' estimates and probabilistic sensory discriminators.

Main Results:

• Affective reference-framing in the preferred-reference duo-trio test improved sensory discrimination compared to the analytical method.
• No decrease in discrimination performance was observed with any instruction type.
• Consumers successfully handled the different test methods.

Conclusions:

• Affective discrimination methods, particularly with no reference information or preferred sample information, are more efficient and reliable for measuring consumer sensory discrimination.
• Repeated tests using affective framing enhance operational efficiency and ecological reliability.
• The study confirms consumer ability to manage complex sensory discrimination tasks.