Please enable JavaScript.
Coggle requires JavaScript to display documents.
SENSORY, 2 TYPES - Coggle Diagram
SENSORY
SCALING
TYPES OF SCALE
category scaling
rate the intensity
not provide values which measure
the degree
line scaling
panel mark on a line rates
magnitude estimation
scaling
with or wo modulus
free number matching
data transform to log
(bec data fell into wide range with few outliers)
TYPES OF DATA
ordinal
category scaling
interval
category/line/magnitude
-acceptance test
nominal
no specific scale
detect outliers
-preference test
-rsimple anking test
ratio
magnitude
DISCRIMINATION TEST/
DIFFERENT TEST
evaluate differences between
2 samples
simple difference test
no direction/characteristic
-triangle test
3 coded sample
-2 same formulation, 1 differ
permutation
AAB
ABA
BBA
BAA
BAB
ABB
determine which sample is odd
-duo-trio test
determine which if 2 sample similar to reference
choose A or B
3 sample (R, A,B)
-difference from control
directional difference test
have difference (eg in sweetness)
-paired comparison test
directional paired comparison
whether 2 samples differ in
specific dimention (sweetness)
sample permutation
AB, 2. BA
forced choice (choose 1)
20-30 panelists
ONE-TAILED test
difference/simple paired comparison
whether 2 samples differ wo
spesific dimension
4 permutations
AA, 2. BB 3. AB, 4. BA
either samples are same or different
TWO-TAILED TEST
-ranking tests
pairwise ranking test
compare several samples for
single attribute
set of 3-6 samples
selected panel, trained,
but inexperieced
present one pair at time
in random order
1 more item...
simple ranking test
compare several sample for
single attribute
present set sample to panel in
balanced, random order
panelists rank samples
panels arranged sample
based upon first trial
3-AFC TEST
alternative forced choice
determine if 2 samples differ in specific dimension
AND which sample is higher in perceived intensity
3 samples, 2 similar
3-AFCfor measuring threshold
3 samples
2-controls, 1 test
25 or more panels
determine practival value close to threshold
2 TYPES
constant reference duo-trio
all panelists receive same sample
formulation as reference
permutation:
Ra AB
Ra BA
MORE sensitive if panelists had prior experience with the product
balanced reference duo-trio
half panelists receive one sample
formulation as reference. the others receive other sample formulation
permutation
Ra AB
Ra BA
Rb AB
Rb BA
MORE sensitive when both products less familiar with panelists