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Applied Sensory and Consumer Science Certificate Program

The Applied Sensory and Consumer Science Certificate Program is an industry-recognized leader for the education of sensory science professionals. The program is continually updated to reflect current and cutting-edge methods in the area of sensory science and consumer testing.

Note: Students must receive a grade of "C" or better in each course to earn the certificate.

Course Outlines*
Course titles Start date
Foundations of Sensory Science October 6, 2014
Sensory Evaluation Methods January 5, 2015
Consumer Testing Methods April 6, 2015
Application of Sensory Science And Consumer Testing Principles July 6, 2015
*Course outlines are subject to change.  


Taught by Howard Schutz, Ph.D. and Rebecca Bleibaum, M.A.

Foundations of Sensory Science

Scope and objectives: Physiological and psychological bases for sensory evaluation and consumer testing.

Lesson 1
Introduction to Sensory Science

  • Introduction to Sensory Science Definition, history, the senses, methods, and differences from other research methods.
  • Basic Sensory Research (medical, categories, nutrition, communication between processors).
  • Roles of Sensory Science in marketing, product development, quality assurance, etc.

Lesson 2
The Senses: Taste–Gustation

  • Gustation (Taste)–primary tastes, anatomy, physiology, and chemistry of taste. Transducer and neural effects including receptor types, stimulus- receptor transducer mechanisms, neural channels, neural codes, and cortical cell types and mechanisms; taste modifiers; adaptation of taste.

Lesson 3
The Senses: Olfaction and Tactile

  • Olfaction (Smell)–anatomy, physiology and chemistry of smell, transduction, adaptation, classification systems, illusions.
  • Tactile (Touch)–tactile sensations, temperature, mouthfeel, pungency, heat, trigeminal pain.

Lesson 4
The Senses: Vision and Audition

  • Vision (Seeing)–eyes: design and anatomy; visual organization including rods, cones, detection, contrast effects, depth, color perception, after effects, adjustments to distorted vision.
  • Audition (Hearing)–mechanisms, anatomy, adaptation, delayed feedback, sound location.

Lesson 5
The Senses and the Brain

  • Tricks the senses may play, senses and the brain, information overload, attention and adaptation, context, illusions.
  • The Mind–how information is processed, analytical and affective components of sensation.
  • Humans as Sensory Instruments–physiological and psychological biases–what can we do?
  • Theory of Sensory Measurement–response bias, psychophysics.

Lesson 6

  • Level of Measurements
  • Purposes of scaling, methods of scaling
  • Ranking
  • What is happening cognitively when we do scaling?
  • What is hedonic scaling?
  • Acceptance testing

Lesson 7
Discrimination Theory and Testing Methods

  • Why some people do better (central vs. peripheral processing)
  • Thurstonian Modeling
  • Memory Effects
  • Creating more sensitive tests
  • Guessing Models for Discrimination Theory

Lesson 8
Signal Detection and the R-Index

  • Signal Detection Theory
  • John Brown's R-index

Lesson 9
Labs and Procedures

  • The Sensory Evaluation Laboratory–environment, test protocol, instructions to panel, palate cleansing, swallowing and expectoration, randomization and labeling, etc.
  • Virtual Tour of evaluation booths.
  • Testing Procedures–strategy, staffing, experimental design options, use of human subjects, selection and training, screening tests, performance assessment.

Lesson 10
Course Summary

  • A summary of lessons 1 through 9.

Note: Students must receive a grade of "C" or better in each course to earn the certificate.

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Taught by Jean Xavier Guinard, Ph.D.

Sensory Evaluation Methods

Prerequisite: Foundations of Sensory Science

Scope and objectives: Common basic methods, theories, and approaches used in the execution of sensory evaluation and consumer testing research.

Lesson 1

  • Review of Course 1 materials
  • Sensory Evaluation Methods (classification and purposes)

Lesson 2

  • Univariate Statistics
  • Measures of central tendency and dispersion; binomial and nominal distributions; Student's t-test; Chi-square; correlation and regression; analysis of variance; multiple mean comparisons

Lesson 3

  • Theory and measurement of thresholds
  • Types of thresholds
  • Applications
  • Methods for measuring thresholds

Lesson 4
Difference Tests

  • Types of difference tests
  • Applications of difference testing
  • Difference vs. similarity testing
  • Difference tests

Lesson 5

  • Types of scales
  • Applications of scaling
  • Uses and abuses of scales
  • Psychological biases in scaling

Lesson 6

  • Multivariate Statistics
  • Basic principles, types of methods and applications
  • Regression methods (RSM, PLS), factor analysis methods (PCA, GPA) and classification methods (Cluster analysis)

Lesson 7
Descriptive Analysis

  • Descriptive Analysis
  • Purposes, applications, principles
  • Panel selection and screening
  • Term generation and scorecard development
  • Panel training
  • Judge performance (criteria and assessment)

Lesson 8
Descriptive Analysis Methods

  • Descriptive Analysis Methods
  • The Flavor Profile Method, The Texture Profile Method, Quantitative Descriptive Analysis (QDA), Spectrum Method, Free-Choice Profiling, etc.

Lesson 9

  • Time-Intensity Measurements: purposes and principles
  • Training for Time-Intensity Profiling
  • Analysis of time-intensity curves

Lesson 10
Instrumental Measures

  • Instrumental Measurements of Sensory Properties
  • Color
  • Texture
  • Flavor (taste and aroma)
  • Relation with sensory measurements

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Taught by Jean Xavier Guinard, Ph.D.

Consumer Testing Methods

Prerequisites: Foundations of Sensory Science and Sensory Evaluation Methods

Scope and objectives: Management of sensory evaluation and consumer testing resources, activities, and their interaction with other business units; exploratory research techniques.

Lesson 1

  • History
  • Terminology
  • Consumer testing vs. market research
  • Types of consumer tests
  • Settings for consumer tests
  • Applications of consumer tests

Lesson 2
Sampling, recruitment, and screening

  • Sampling and demographics
  • Sample size and power issues
  • Source of test subjects: employees vs. local residents vs. population at large
  • Databases and subject pools
  • Recruitment methods
  • Screening

Lesson 3
Quantitative tools

  • Preference testing
  • Measurement of liking
  • Just-right scales
  • Other acceptance rating scales
  • Other scales or tools used in quantitative market research
  • Questionnaire design
  • Special issues
  • Product optimization applications of hedonic ratings by consumers

Lesson 4

  • Demographics, psychographics, attitudes, usage and genetics
  • Understanding consumer language–the Repertory Grid Method
  • Segmenting consumers based on preferences for product or service features–Conjoint Analysis
  • Segmenting consumers based on sensory liking–Internal Preference Mapping and Preference Clustering

Lesson 5

  • Definitions of "context" and context variables
  • History of context research
  • Documented effects of context variables on consumer behavior and responses
  • Use of Robust Design Methodology to study context effects
  • Implications of context research on consumer testing methodology

Lesson 6
Laboratory, central location, home-use and other field tests

  • Surveys
  • Online market research–Testing through the Internet
  • Internal laboratory tests (with employees or local residents)
  • Central Location Tests
  • Home Use Tests
  • Other field tests (e.g., mobile laboratory, simulated-supermarket setting, etc.)
  • Testing with special populations
  • Contracting a consumer test to a market research agency

Lesson 7
Qualitative methods

  • What is "qualitative"?
  • Idea generation methods
  • Focus groups
  • In-depth individual interviews
  • Projective techniques
  • Ethnography
  • Using the Internet for qualitative research

Lesson 8
Relating consumer and sensory data

  • The regression method
  • Response surface methodology
  • Principal component analysis of sensory attributes and hedonic ratings
  • Internal preference mapping with projection of sensory data
  • External preference mapping
  • Drivers of liking

Lesson 9
Market research methods

  • Consumer trends research
  • Usage and attitudes studies
  • Means-End Chain Analysis
  • Conjoint analysis
  • Simulated Test Markets
  • Advertising research

Lesson 10
Consumer-driven innovation

  • Chronemics Method
  • The Gemba Method
  • The Quali-Quanti Method
  • Customer-Defined Quality
  • Empathic design

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Taught by Howard Schutz, Ph.D. and Rebecca Bleibaum, M.A.

Applications of Sensory Science and Consumer Testing Principles

Prerequisites: Foundations of Sensory Science, Sensory Evaluation Methods and Consumer Testing Methods

Scope and objectives: Current business applications of the foundations, principles, and methods taught in the first three courses, for sensory evaluation and consumer testing.

Lesson 1
Product Development Principles

  • Stages of Product Evaluation and Product Life Style
  • Brand Control, Competence Structure, and Sensory/Consumer Testing Activities
  • Basic Assumptions of Product Development
  • Steps in Product Development
  • Aspects of Marketing Specificity
  • Aspects of Product Specificity
  • Product Development Activities Related t Specificity

Lesson 2
Quality Control and Stability Testing

  • Overview and Background
  • What is Quality?
  • Implementation of a Sensory Specification
  • Special Issues with Sensory Specification
  • Measuring Product Stability–Shelf Life
  • Final Thoughts

Lesson 3
Product Improvement

  • Why Do We Improve Products?
  • Where Do Line Extensions Fit into Product Improvement?
  • Discrimination Methods in Product Improvement
  • Descriptive Methods in Product Improvement
  • Affective Methods in Product Improvement
  • Qualitative Methods in Product Improvement
  • Product Development Case History

Lesson 4
New Product Development

  • How Do Companies Get New Product Ideas?
  • The Hierarchy of New Products
  • Front End of Innovation
  • Concept Generation
  • Concept Identification
  • Consumer Driven Innovation
  • Product Development and Evaluation
  • Product Development and Validation

Lesson 5
Product Optimization

  • The "Optimum Product" Fallacy
  • Qualitative Evaluation in Product Optimization
  • Number and Selection of Products for Optimization
  • Descriptive Evaluation in Product Optimization
  • Analytical Evaluations in Product Optimization
  • Measuring Consumer Acceptance in Optimization Research
  • Selecting Variables to Predict Product Liking in Optimization
  • Reducing Redundancy in Descriptive and Analytical Variables
  • Statistical Analysis in Optimization
  • Segmentation in Optimization
  • Non Sensory and Acceptance Aspects of Optimization
  • Does Optimization Work?
  • Validation
  • Conclusions

Lesson 6
Post Marketing Audits

  • Overview
  • Product Maintenance Strategies
  • Retail Audits
  • Product Procurement for Marketing Audits
  • Sensory Science and Consumer Testing Methods Used in Audits
  • Marketing Audit Example
  • Market Audit Business Effects
  • Case History–Chocolate Chip Cookies

Lesson 7
Extended Use Testing

  • Why Would a Product Change in its Acceptance Over Time/Repeated Use?
  • Which Products Should Undergo Extended Use Testing?
  • How Much Sample for Extended Use Testing?
  • Where Do Extended Use Tests Take Place?
  • How Many Evaluations Qualify for Extended Use?
  • What Types of Sensory/Consumer Evaluations Can be Used in Extended Use Testing?
  • How Does Monotony Relate to Extended Use Testing?
  • How Does Extended Use and Satiety Relate?
  • Purchase of Extended Use Evaluations
  • How Do Extended Use and Brand Loyalty Relate?
  • Conclusions

Lesson 8
Advertising Claims

  • Who Regulates Advertising Claims?
  • Schrank's Categories of Advertising Claims
  • Superiority Claims
  • Developing an Advertising Claim
  • Case Histories
  • Planning and Advertising Claim
  • Generic Deposition or Testifying as an Expert Witness
  • Defending Against a Competitive or Regulatory Activity Directed At Your Company
  • Conclusions

Lesson 9
Resources and Issues in Sensory Science and Consumer Testing

  • Strategic Management of Your Resources
  • Sensory Science Interaction with Market Research Department
  • What Does Sensory Science and Consumer Testing have to Offer Market Research?
  • Interaction of Sensory Science and Production
  • Why Use Outside Resources or Vendors
  • Choice of a Vendor
  • Partial Vendor List for the United States, Canada, and Parts of Europe
  • Partial List of Journals and Publications of Interest
  • Ethics in Sensory Science and Consumer Testing

Lesson 10
The Future of Sensory Science and Consumer Testing

  • Education of the Sensory Scientist
  • Tools for Data Collection
  • Digital Aroma Technology
  • Sensory and Consumer Testing Methodology
  • Taste Modifiers Research
  • Cross Cultural Research
  • Non-Food Applications
  • Final Send-off for Students

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"Thank you again for the quality of the UC Davis Extension online certificate, it really made a difference in my work life."

Jonathan Rason, MARS

"The Applied Sensory and Consumer Science Certificate Program is for anyone who is in the business of producing consumer products. To be able to understand what your customer wants, how to deliver the product and sustain marketability is the goal of any organization. Here you will learn and develop those skills, allowing you to help lead your organization to the top leaving your competitors in the rear view mirror."

Robert Ronayne, corporate chemist, Hillshire Brands Company

"The strengths of this program were definitely the user friendly online format. The course material was easily accessible and the weekly lesson/assignment structure was great. I never felt overwhelmed or behind in the course. Of course, the material offered was very comprehensive and beneficial--finally filling in those gaps."

Catherine Hilborn, Parmalat