Chapter 1: Basic Foods Flashcards
(152 cards)
Measurement of physical and chemical properties of food using equipment or mechanical devices
Objective evaluation
Measurement of the characteristics of food as perceived by the senses (sight, smell, taste, touch, and hearing)
Subjective evaluation
Designed to determine whether detectable differences exist between products
Difference test
To determine acceptability and to define the direction in which the project should move
Single sample
Test difference
Test of 2 samples presented to identify the sample with the greater amount of the characteristics being measured
2 different products 2 sample test
Paired comparison
Two samples are provided, and panelists are asked to identify which sample is higher in a particular attribute
Paired comparison
You present three samples to panelists: two are the same, and one is different. The task is to identify the odd one out.
Triangle test
3 samples are presented simultaneously with 2 samples alike, can either be the control or the variable
Judge must identify the ODD sample
Triangle test
a test of difference
3 samples: 1 variable, 2 controls
Duo-trio test
You provide a reference sample followed by two test samples: one matches the reference, and the other differs. Panelists must determine which test sample matches the reference.
Duo-trio test
Judges are asked to rate the quality of the food
Scoring test
Use of descriptive words to characterize food samples
Judges are asked to describe the products (dull green, bright green, green)
Descriptive test
Used when several samples need to be evaluated for a single characteristic
Rank order/ranking test
Employs a pleasure scale or degree of liking or preference
Hedonic scale may be 5, 6, 9 steps - end of the scales being the extremes of preference or non-preference
Hedonic method
Designed to provide information on selected characteristics and to indicate preference or acceptability of the product
Preference/acceptability test
Physical and environment requirements: Temperature and relative humidity
Temp: 25C
Humidity: 40%
Selected from panel who is available at test site and are willing to participate
200 or more
Consumer panel
Expert tester (1-2 members); laboratory panel (9-12 members)
Trained panel
Untrained on product evaluation to be undertaken
50 members
Naive panel
Cassava, sweet potato, white potato, gabi, ubi, taro
Roots and tubers
Garlic, onion, shallot
Bulbs
Beans, monggo, patani
Seeds
Broccoli, kinchay, labong
Stems and shoots
pechay, spinach, kangkong, lettuce, malunggay, cabbage
Leaves