sensory assessment

Question 1

History

Answer 1

sensory tests used to be used to assess quality of water, weapons, etc.

in trading it became formalized

in the 1900s professional tasters were used

the US army started using systmeatic sensory analysis for food

finally a scientific method was developed for an objective assessment of food

Question 2

definition of sensory evaluation?

Answer 2

a method to eboke measure analyze and interpret response to products through the 5 senses (american society for sensory asessment 1975)

Question 3

two types of sensory assesment

Answer 3

1. EXPERTS (analytic instruments)

2/ CONSUMERS (consumer response)

Question 4

key elements for sensory assessments

Answer 4

clear instructions
individual booths/limited distractiosn
identical sized food samples
controlled lighting
water/lime juice as palette cleansers

Question 5

what are the taste buds

Answer 5

area in tongue which detects:
sweet
sour
bitter
salty
umami

Question 6

what is sensation

Answer 6

by biochemical processes where a stimulus in a sense organ sends signals to the brain to elicit a response

Question 7

how can sensation be perceived

Answer 7

1. by smell and taste (combination; retronasal)
2. physical sensation (cooling/heating)
3. tactile sensatino (touch, crispness, firmness, etc. )

Question 8

how do we normally perceive food

Answer 8

appearance–> odor/aroma–> consistencty—> flavour

Question 9

how are sensory tests used in industry

Answer 9

• develop new products and check the quality of existing products
• monitor samples from production line
• measure and test shelf line
• tests consumer response to new/old products

Question 10

what types of testing are there?

Answer 10

discrimination tests
descriptive analysis
affective/hedonic tests

Question 11

qualitatiave discriminative testing?

Answer 11

based on relaativity and comparison where 2 products are compared for procedure simplicity and fast information

i.e. paired/triangle test

Question 12

quantitative/qualitative discriminative testing?

Answer 12

RANKING process: several products are compared and ordered into samples in increasing/decreasing perceived intensity of a specific sensory attribute

Question 13

descriptive tests process

Answer 13

paneltists detect, describe and quantify the sensory attributes of a sample using SEVERAL qualtiative aspects (aroma, flavour, sound) and intensity/degree is described

often use ‘spider diagram’s

Question 14

descriptive tests aim

Answer 14

define sensory products of traditional/target prpduct
define CONTROL for R+ D
discover characteristics of product before consumer response
track product changes over time