Info

"Percent of panelists who rate the product as definitely or probably would buy on a 5-point buy scale (1 = definitely not buy to 5 = definitely would buy.) Remaining scales = 0-100.

"Percent of panelists who rate the product as definitely or probably would buy on a 5-point buy scale (1 = definitely not buy to 5 = definitely would buy.) Remaining scales = 0-100.

When coupled with experimental design and modeling (by regression analysis), sensory analysis becomes a powerful tool to guide product development.

Experimental Design

An alternative approach beyond directional scales to develop products using consumers, consists of systematically varying the formula ingredients in a way which allows one to assess the effects of each ingredient, and the interac tions among ingredients on acceptance and attribute perceptions.

Experimental designs are properly the province of statisticians (30). Sensory analysts and product developers have used experimental designs with great success to understand consumer reactions to test prototypes comprising known ingredients and processes. Product categories amenable to these designs range from simple food systems such as a fruit-flavored beyerage, to complex systems such as pizza, apple pie, and sausage. In all cases the assessment

Figure 1. Example of quantitative descriptor analysis "spider plot" of the aroma of a sample. Scale: 0 at center to 30-40 at edge. Source: Ref. 10.

Table 11. Verbal Descriptors for Hedonic Scales

Number of scale points descriptors"

2 Dislike, unfamiliar

3 Acceptable, dislike, not tried

3 Like a lot, dislike, do not know

4 Well liked, indifferent, disliked, seldom if ever used

5 Like very much, like moderately, neutral, dislike moderately, dislike very much 5 Very good, good, moderate, dislike, tolerate

5 Very good, good, moderately well, tolerate, dislike

6 Very good, good, moderate, tolerate, dislike, never tried 9 Like extremely, like very much, like moderately, like slightly, neither like nor dislike, dislike slightly, dislike moderately, dislike very much, dislike extremely

Food action (fact) rating scaleb

Eat every opportunity

Eat very often

Frequently eat

Eat now and then

Eat if available

Do not likeā€”eat on occasion

Hardly every eat

Eat if no other choice

Eat if forced

Table 12. Example of Attribute Profile Ratings Using Different Attributes Liking, Image, and Directional, Product: Spaghetti and Meatballs"

Product6

Attribute #1 #2

Table 12. Example of Attribute Profile Ratings Using Different Attributes Liking, Image, and Directional, Product: Spaghetti and Meatballs"

Attribute #1 #2

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