Sensory professionals seeking guidance in best practices often turn to publications from standards organizations such as ISO and ASTM. A review of guides related to sensory equivalence testing will be presented. In several cases the power approach is prescribed for determining equivalency, but this approach is problematic. It attempts to control beta risk in the difference test and declare samples
Producing products of reliable quality is vitally important to the food and beverage industry. In particular, companies often fail to ensure that the sensory quality of their products remains consistent, leading to the sale of goods which fail to meet the desired specifications or are rejected by the consumer. This book is a practical guide for all those tasked with
This abstract is unavailable. Please contact us for additional information. Castura, J.C. (2010). Similarity testing & equivalence testing. In ASTM E-18.04 Seminar on Discrimination Methods. April 22. St. Louis, MO, USA.
Equivalence testing has applications that include ingredient substitution and product matching. Statistical methods for determining equivalency were the subject of some interest in this journal prior to the Sensometrics 2008 conference (Bi, 2005; Meyners, 2007; Bi, 2007; Ennis, 2008a; Bi, 2008; Meyners, 2008; Ennis 2008b). A mini-symposium on equivalency at Sensometrics 2008 provided an opportunity for collegial discussion.
A so-called donkey voter selects candidates according to position on an election ballot. Are untrained sensory panellists similarly influenced by position when responding to choose-all-that-apply (CATA) questions? In sensory and consumer testing, lists of choices, conventionally presented in fixed order, allow panellists to indicate sensory perceptions without requirements for scaling. Results help in understanding products and drivers of hedonic response.
Check-all-that-apply (CATA) questions have been used in consumer studies to determine key sensory attributes characterizing a specific product. CATA has the particularity of assessing perceived product attributes without requiring scaling. The objective was to determine the effects of the number and order of the choices in CATA questions on attribute selection and consumer response time.
Consumer testing of products which create sensory fatigue have a number of serious challenges. The effect of consumption of alcoholic beverages, extremely spicy foods, intense flavors or numbing ingredients limit the collection of complete block data to a small number of samples. If a study with a large number of samples is conducted by collecting consumer data over several days,
In a random sampling of consumers, it is not unusual to have a proportion of the panellists who are neither users or purchasers of the product. This means that “liking” responses to products are not informed by either context or experience. This reduces the validity of the test. When we consider that choice reflects the ability to detect a difference,
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Consumer testing of beverage alcohol has a number of serious challenges. The effect of consumption of alcohol is a limiting factor in obtaining complete block data. Collecting consumer data over several days affects the quality of the consumer response. By the third day, most consumers are behaving like trained assessors, a conclusion that is supported by the decrease in first