Sensory Evaluation
A Practical Handbook
1. Auflage April 2009
208 Seiten, Softcover
Praktikerbuch
Kurzbeschreibung
This book is a practical guide to sensory evaluation methods and techniques in the food, cosmetic and household product industries. It explains the suitability of different testing methods for different situations and offers step-by-step instructions on how to perform the various types of tests. Covering a broad range of food and non-food product applications, the book is designed to be used as a practical reference in the testing environment; a training manual for new recruits into sensory science, and a course book for students undertaking industrial training or academic study.
Sensory testing in the food, cosmetic and household product industries is integral to the development and manufacture of products that consumers want to buy. A greater understanding of the benefits of sensory science has lead to rapid development and growth in the profession over recent years, and the demand for more technical staff increases as the number and size of sensory departments continue to expand.
This book is a practical guide to sensory evaluation methods and techniques, explaining the suitability of different testing methods for different situations and offering step-by-step instructions on how to perform the various types of test. Covering a broad range of product applications including food, beverages, personal care and household products, the book is spiral bound to allow for easy reference in the testing environment.
The objectives of the book are
* to provide a practical guide and laboratory manual on how to carry out sensory evaluation techniques
* to reach sensory practitioners, as well as sensory scientists, by using a simple, easy-to-read, easy-to-use format
* to be affordable to a wide audience who would not ordinarily be able to afford to purchase standard sensory text books, including students, technicians and practitioners in developing countries
* to cover the IFST PFSG accreditation scheme at foundation and intermediate levels
The book is suitable as a training manual, reference text, teaching aid and course book. Key audiences include sensory practitioners, junior sensory staff, sensory students and sensory trainers.
Also available from Wiley-Blackwell
Sensory and Consumer Research in Food Product Design and Development
H.R. Moskowitz, J.H. Beckley and A.V.A Resurreccion
ISBN 9780813816326
Flavor Perception
Edited by A.J. Taylor
ISBN 9781405116275
2. PLANNING YOUR SENSORY PROJECT.
The human senses.
Sight, smell, taste, touch and hearing.
Factors influencing sensory measurements.
Psychological and physiological errors.
Factors influencing test design.
Defining your clients needs: identifying test objectives, application, budget, deadlines, setting action standards.
Hypothesis testing.
Experimental design: balancing, randomisation, blocking, Latin square, replication, size of sample/panel.
Statistical analysis.
Professional conduct, ethical issues and good laboratory practice.
Hygiene.
Safety.
Ethical handling of panellists (informed consent, ethical committee approval, employment law, panellist records, Data Protection Act).
Health consideration for panellists: Allergens, medications.
IP consideration.
.
3. REQUIREMENTS FOR SENSORY TESTING.
Testing Facilities.
Equipment, lighting, colour, temperature, humidity.
Purpose built facilities: sensory testing laboratory, consumer test facilities, specific applications.
Temporary facilities: portable booths, CLT.
Testing in the home.
Samples.
Preparation and presentation: palate cleansers, serving vessels, carriers, coding, order of presentation.
Reference and control samples.
Sample assessment procedures.
Disclosing ingredients.
Panellists.
Screening and Selection.
Training.
Motivation.
Monitoring performance.
Working with panels: setting up new panels, integrating new individuals into existing panels.
Good working practices for panellists: Smoking, personal hygiene, perfume..
Data Capture.
Pen and paper.
Computerised systems.
Video cameras.
Portable systems.
4. SENSORY TEST METHODS.
Each test is described using the same format including - objective and rationale, experimental design, procedure, example of worksheet, data analysis, conclusion, a worked example and 'dos and don'ts'.
.
Discrimination tests.
Introduction.
Overall difference Tests: Triangle, Duo-Trio, Difference from control, Similarity.
Attribute specific: Paired comparison (2 AFC), 3AFC, Ranking.
Other tests: same/difference (with surety rating = R-index), Threshold tests.
Descriptive tests.
Introduction.
General procedure: qualitative attribute generation, quantitative analysis (inc scale options) etc.
Specific methodology: QDA, Spectrum, QFP, Free Choice Profiling, Consensus.
Time Intensity.
Affective/Consumer tests.
Introduction\.
Qualitative methods: focus groups.
Quantitative methods: preference, hedonic rating.
Questionnaire design.
Combining results from different tests.
Linking sensory and consumer data.
5. COMPLETING THE PROJECT.
Reporting.
Report format: title, abstract or summary, aims/objectives, action standard, introduction/background, method, results and discussion, insight, conclusions, recommended action, references..
Data storage.
Documentation.
.
GLOSSARY .
BIBLIOGRAPHY .
Appendix 1.
Considerations for sensory evaluation of specific product types.
Appendices 2-12.
Statistical tables.
INDEX
Dr Tracey Hollowood is Associate Director: Sensory and Consumer Research, Sensory Dimensions Ltd, Bulwell, Nottinghamshire, UK.
Dr Joanne Hort is Associate Professor in Sensory Science, Nottingham University, UK.
