100% tevredenheidsgarantie Direct beschikbaar na je betaling Lees online óf als PDF Geen vaste maandelijkse kosten
logo-home
Eerder door jou gezocht
Eerder door jou gezocht
logo
Summary lectures HNE-30506 €3,49
In winkelwagen
Snel navigeren naar
Voorbeeld
  2.  
  3. Wageningen University (WUR)
  4.  
  5. Principles of Sensory Science

Samenvatting

Summary lectures HNE-30506

2 beoordelingen
 2 keer verkocht

Complete summary of the lectures written in the form of questions. For questions or if something is unclear, feel free to contact me. Note: pictures may not be shown in the example, but they are really there! :)

Laatste update van het document: 8 jaar geleden

Voorbeeld 3 van de 32  pagina's

Document informatie

  • 17 oktober 2016
  • 17 oktober 2016
  • 32
  • 2016/2017
  • Samenvatting

Onderwerpen

Geschreven voor

Alle documenten voor dit vak (5)

2  beoordelingen

review-writer-avatar

Door: lotteterhuerne • 6 jaar geleden

review-writer-avatar

Door: nicoletimmerman • 7 jaar geleden

Voornamelijk letterlijk de slides onder elkaar en weinig extra informatie over wat het betekent/voorbeelden uit het college

Verkoper

avatar-seller
Inge-Sofie

Ontvangen beoordelingen

Voorbeeld van de inhoud

Summary Principles of Sensory Science
Lecture 2: Selection and Training of Sensory Panels
- Chapter 3 – Principles of good practice; 3.5 Panellist consideration.
After the lecture the student is expected to:
- Know how to select assessors for sensory panels for different purposes
- Understand the role of the panel leader for the success of sensory projects
- Know different manners of attribute generation
- Be able to generate sensory attributes for the QDA in this course
- Understand and be able to explain how different methods of descriptive analysis require different
degrees of training
- Know and be able to apply the methods of consensus training and individual vocabularies

Why select sensory subjects?
→ Find all the nuances that can be detected e.g. intensity.

How to select sensory subjects?
→ Recruitment of analytical sensory panels (repeatable and precise):
- Internal or external
- Age 20-55 (senses are stable)
- Test about twice the number of subjects needed
- Announcement… media, canteen, class, etc.
→ Panel selection by questionnaire:
- Personality: Be able to work in a team; ”Cosmopolitan” preferences; Positive not over-
bearing; Good listener and communicator; Committed and flexible.
- Health: General good health condition; Documentation of any health restrictions
(medication, allergies, pregnancy, false teeth, …)
- Availability
→ Panel selection by tests for sensory ability
Example of a rapid taste
test is papers dipped in
different concentrations
to test if you taste the
basic taste.
Rapid odour test Sniffin’
sticks:




How to train sensory subjects?/ When is the panel trained enough?
→ General training: familiarisation with test protocols, discrimination tests, intensity scaling
→ Product specific training: describe what the different properties are, especially important for
descriptive analysis.
→ Attribute specific training: making concepts cognitive clear (=understandable) to the sensory panel

,Selection and training of subjects needed for descriptive, not for threshold and discrimination:




Check performance over time?
→ Monitoring of performance of analytical sensory panels
- Inter individual variation (between individuals)
- Intra individual variation (within individual)
- Sequential analysis – long-term performance
- Feedback on performance to individual or panel

What are the roles and personal characteristics of a panel leader?
→ Type of roles (depending on the method)
- Passive facilitator (e.g. QDA)
- Directive leader (e.g. Spectrum)
→Personal characteristics
- Non-judgemental/opinionated
- Sensitive and assertive, but diplomatic
- Leading panel discussions but active listener
- Recognises and guards against moderator bias
- Ability to motivate panel


Lecture 1: Descriptive Sensory Analysis
- Chapter 10 – Descriptive analysis
After the lecture the student is expected to:
- Know the principles of methods such as mapping, napping, Flash Profile and their field of application

What is descriptive sensory analysis?
- A method aiming to provide a quantitative measure of the sensory properties for a set of
products
- A number of different approaches
o Trademarks (QDA and Spectrum)
o Speed versus accuracy (accuracy not good with rapid methods; training panel for a
long time gives a food accuracy, find a lot of details)
o Relations to instrumental measures (perception of sourness and ph value in milk; if
correlated that replacement of sensory panel by instrument)

, Why using descriptive sensory analysis?
- Product reformulations
- New product development
- Quality control
o Acceptability to specified target
o Calibration of instrumental methods
- Brand mapping (e.g. identifying sensory niches)
- Consumer preference mapping
- Research
o Understanding relationships between product/process/production properties and
perceptible properties

What are the main differences between methods?
- Generation of sensory descriptors
- Degree of subject training
- Use of reference materials and scaling




What is the flavor profile method?
- Consensus method (4-6 judges; 2-3 weeks training)
- A qualitative descriptive method – no statistical analysis possible due to consensus scores
- Reference materials for discussing and defining
- Limited to flavour impressions
- Estimate intensity of flavour attributes (aroma, flavour, mouth feel and aftertaste). Expand
with - + ½ ↑ ↓




- Estimate intensity of overall amplitude (overall balance and blending of product):

What is the Quantitative Descriptive Analysis?
- Data from individual panel members (n=10-12) in sensory booths
- Concensus wrt. attribute generation and use
- Reference standards used only occasionally
- A 6 inch (15.2 cm) continuous line used for measuring intensity (psychological research)
- All kinds of sensory attributes
- Selection of attributes for all modalities or fewer
- Risk for perceptual dumping considered in attribute selection – include e.g. ”other
impressions”
- Panel leader is passive member in selecting attributes; facilitates the process
→ Many variations on this method but should not be called QDA!

Dit zijn jouw voordelen als je samenvattingen koopt bij Stuvia:

Bewezen kwaliteit door reviews

Bewezen kwaliteit door reviews

Studenten hebben al meer dan 850.000 samenvattingen beoordeeld. Zo weet jij zeker dat je de beste keuze maakt!

In een paar klikken geregeld

In een paar klikken geregeld

Geen gedoe — betaal gewoon eenmalig met iDeal, creditcard of je Stuvia-tegoed en je bent klaar. Geen abonnement nodig.

Direct to-the-point

Direct to-the-point

Studenten maken samenvattingen voor studenten. Dat betekent: actuele inhoud waar jij écht wat aan hebt. Geen overbodige details!

Veelgestelde vragen

Wat krijg ik als ik dit document koop?

Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.

Tevredenheidsgarantie: hoe werkt dat?

Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.

Van wie koop ik deze samenvatting?

Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper Inge-Sofie. Stuvia faciliteert de betaling aan de verkoper.

Zit ik meteen vast aan een abonnement?

Nee, je koopt alleen deze samenvatting voor €3,49. Je zit daarna nergens aan vast.

Is Stuvia te vertrouwen?

4,6 sterren op Google & Trustpilot (+1000 reviews)

Afgelopen 30 dagen zijn er 69252 samenvattingen verkocht

Opgericht in 2010, al 15 jaar dé plek om samenvattingen te kopen

Begin nu gratis
€3,49  2x  verkocht
  • (2)
In winkelwagen
Toegevoegd