Sensory Analysis.

Starter Activity Around the room are 3 different types of industry sensory analysis methods. Individually read the activity sheet and

complete the activity in SILENCE! Ensure you follow the instructions fully – this

information will be used later in the lesson.

Learning Outcomes KNOWThe different types of sensory testing that industry usesUNDERSTANDThe purpose and methods of the sensory testingBE ABLE TO...PARTICIPATE in sensory analysis IDENTIFY and DESCRIBE the purpose of sensory testing in

industryIDENTIFY and DESCRIBE the different methods of sensory testing CREATE answers to exam questions

What is Sensory Analysis? 1. A scientific measurement of the

qualities of a product by the senses.2. Used to trial and test products during

development 3. A controlled environment to give

accurate results.

Activity 1 What is the purpose of sensory testing (4 marks) 1. Ensure product matches the specification2. Checks product against competitors products3. Enables informed decisions on changes of a

product if there are concerns about it’s profile4. Tests shelf life of the products – does it match

what is agreed?5. Checks standards of the product. Is every

product matching the prototype?

Activity 2 - How do you conduct fair tests in sensory evaluations? Testing should be in

a room which is Well lit boothFree from other

smellsNo other stimulus Food served in

identical containers

Equal in size Coded e.g. Sample

A/ sample B or 9536/2974

Clear instructions for the tester

Simple response sheet

Complete the table to explain why the following is required for good sensory testing...

Situation Reason

Set in a quiet area in a separate booth

Give drinkers lemon flavoured water between each sample

Small equal quantities of sample

Clean spoon for each sample

Use of random numbers

Have all charts ready at the beginning of the testing

Testers know how to complete chart.

Activity 3- Industry sensory analysis...answers

Situation Reason

Set in a quiet area in a separate booth

Testers are not influenced by others. Can focus on product

Give drinkers lemon flavoured water between each sample

Cleanse the pallet

Small equal quantities of sample Fair test – accurate results

Clean spoon for each sample No contamination of samples

Use of random numbers Testers are not influenced by sequence

Have all charts ready at the beginning of the testing

Organisation

Testers know how to complete chart.

Ensure completed correctly.Gives accurate and correct results

Industry testing booths.

Industry testing booths. Why do you think the lighting is altered?

Prototypes......How would you describe a prototype?

(DESCRIBE means to give an idea of something by talking about it’s nature or properties)

You have 2 minutes to try and write a definition.

A prototype is the first versions of a product often used as part of the development, testing and evaluation process.

APL – dips and dippersLook at one of your design ideas from an earlier lesson.

How could you develop a prototype from this idea.....?

Use your knowledge of development and describe how you could make appropriate changes to it.

Examples of sensory testing techniques...

Difference testing...... PURPOSE- to determine whether

there are any DIFFERENCES between TWO OR MORE products.

INCLUDES - Comparison testing Triangle test

USES - change of ingredient Change of making process Identification of improvement Comparison against

competitors product

Sample

1st choice

2nd choice

3rd choice

Score order

A II IIII 6 2

B I II I 4 3

C III IIII 7 1

D I II 3 4

Paired comparison tests? PROCEDURE- Coded pairs of samples are tested for a

DIFFERENCE of CHARACTERISTICSExample – which dip product do they prefer- cheese or

garlic. At least SIX TESTERS are needed to make results RELIABLEMost SIMPLISTIC TEST.

Triangle testing Consists of THREE samples – 2 IDENTICAL/ 1 DIFFERENTExample 2 Aioli dips vs. 1 cheese dip.Testers need to IDENTIFY the DIFFERENT SAMPLEAfterwards participants can be asked to IDENTFY the

DIFFERENCESUSED as a QUALITY CONTROL to ensure batches are THE SAME BENEFIT- more efficient than paired comparison

Ranking/ hedonic test PROCEDURE- Samples given in a random orderTasters have to rank in order of preference of a specific

quality ( e.g. Salty taste) Minimum of 10 testers required to give accurate resultsUSES- to screen 1- 2 best samples from previous test

Like extremelyLike very muchLike slightlyNeither like/dislikeDislike very muchDislike extremely.

Childs scale

Descriptive testing or profiling

PURPOSE- gives a DETAILED EVALUATION of a products CHARACTERISTICS

PROCEDURE - Testers GIVEN SENSORY DESCRIPTORS APPEARANCE- Colourful, ODOUR- pungent MOUTH TEXTURE- dry, smooth FLAVOUR- TEXTURE- mushy

SIX or more TRAINED TESTERS needed to make accurate

Activity 4- Using your design idea from the design task lesson Explain how this design will offer sensory appeal (4 marks )

Higher June 2007

Answer Different textures in fillingDifferent texture in dipper productUse of toppings / finishing techniquesUse of flavouring / dressing in both dipper and dipping

productUse of aroma- herbs, spicesMay give examples of how ingredients give variety

4 marks - Qualified answers well explained or number of simplistic answer2-3 marks - Qualified answer or two simplistic answers 1 mark- Simplistic answer

Review K

What do I already know?

WWhat do I want to

know?

LWhat have I learnt?