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Sensitivity comparison of sequential monadic and side-by-side presentation protocols in affective consumer testing.

Jessica M Colyar¹, Dennis L Eggett, Frost M Steele

¹Dept. of Nutrition, Dietetics and Food Science, Brigham Young Univ., S-221 ESC, Provo, UT 84602, USA.

Journal of Food Science

|November 10, 2009

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The side-by-side consumer liking protocol is generally more sensitive than sequential monadic testing, often requiring fewer participants. However, sequential monadic testing may be preferred when sensory fatigue is a concern.

Area of Science:

Sensory Science
Consumer Research
Food Science

Background:

Consumer liking protocols are crucial for product development and quality assessment.
Evaluating the sensitivity and efficiency of different testing methods is essential for optimizing research design.

Purpose of the Study:

To compare the relative sensitivity of side-by-side and sequential monadic consumer liking protocols.
To determine the minimum number of panelists required for each protocol to achieve desired sensitivity levels.

Main Methods:

Five product categories (orange juice, frankfurters, canned chili, potato chips, applesauce) with five commercial brands each were used.
Panelists evaluated the same five brands using both side-by-side and sequential monadic protocols, with a three-week interval between evaluations.

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Statistical power analyses were conducted on hedonic liking scores.

Main Results:

Both protocols yielded similar overall liking orders for most products; differences were not statistically significant.
The side-by-side protocol demonstrated higher sensitivity in most cases, requiring fewer panelists.
The sequential monadic protocol was less sensitive when sensory fatigue was a factor.

Conclusions:

The side-by-side protocol is generally more efficient and sensitive for consumer liking studies.
Protocol choice should consider potential factors like sensory fatigue to ensure optimal results.
Understanding protocol sensitivity aids in determining appropriate sample sizes for robust consumer research.