uses of computer in sensory evaluation fields

1. P R E S E N T E D B Y
O M A R A L A J I L ( ‫أ‬.‫ل‬ ‫ي‬ ‫ج‬ ‫ع‬ ‫ل‬ ‫ا‬ ‫ر‬ ‫م‬ ‫ع‬ )
M . S C F O O D T E C H N O L O G Y
Computer Aided Sensory
Evaluation for Foods and Beverages

2. Table of
Continents
Question
 human sense vs. computer
E-Tongue & E-Nose
Computer application in sensory
evaluation
Integrated software for sensory
evaluation
Compusense five software
Case study
Conclusion
References

3. How can the computer be Useful in
sensory evaluation field
QUESTION

4. will the computer eat the food and evaluate it

5. Human Senses

6. Does the computer have those senses
Human
senses
Sight
Hearing
Taste
Smell
Touch
Computer
Color
detectors
Sound
detectors
E-Tongue
E-Nose
Texture
instruments

7. Today We have
Color detector and
sound detectors

8. Also we have E-Tongue And E-Nose

9. E-Nose

10. E-tongue & E-
Nose
Though e-nose and e-
tongue are very good in
detection of chemical
compounds , but they
can not tell which food
is better in taste or
smell.
Now a days e-nose has a
lot of application but
mostly medical
application
E- tongue is emerging
technology which has a
lot of promise in
medical fields

11. How can the computer be Useful in
sensory evaluation field
QUESTION

13.  Developments in hardware and
software in the last decade have
dramatically changed the role of
computers in sensory analysis.
 Besides data-entry and data-
analysis, personal computers are
used more and more for data-
collection, experimental design and
panel-management.
 Tests are prepared on the personal
computer, the questions are
displayed on screens in the tasting
booths, the subjects can enter their
responses directly and the results
can be available instantaneously..
Computerizing the sensory evaluation

14.  New approaches to software
development, like object-
oriented programming,
artificial intelligence and
relational database
management systems will make
it possible to use the computer
for more aspects of sensory
evaluation.
 It is important to identify the
different tasks in the laboratory
that can be automated and to
look for the right tools to use.

15. Software for sensory Evaluation
There is no special data
input method for
sensory evaluation, but
it require special
integrated software
which is flexible , user
friendly , and
inexpensive.

16. Integrated Sensory Evaluation Software
Data collection
Data quantification
Data analysis
Data reporting

17. Some data collection input devices

18. Automated
Interactive
Flexible-Wireless
Pen or/and keyboard
Handwritten notes
Data Collection– TabletPCs

19. Compusense five is
sensory evaluation
software that allows
you to conduct a
comprehensive test,
right from the
planning stage
through to analyzing
and reporting your
results.
Simply install it on
your local area
network (LAN) to
start running tests
that yield reliable,
repeatable results.
Cmpusense
introduction video

20. Start end

21.  Question types include
line scale, category/hedonic, keypad, ranking, multiple choice,
standard descriptor (choose all that apply), triangle, duo-trio,
R-index, paired comparison, comment, Labeled Magnitude
Scale, and Time Intensity. Use these questions and customize
them to suit your needs.
 Flexible question designs with options such as attribute
definition pop-up boxes, the ability to hide question
responses, and to force an answer before moving to the next
question.
 Add graphic images, videos, and sound files to your test. Give
verbal instructions to your panelists.
Compusense five software features

22. Compusense five software features
 Create custom templates! Customize and re-use
questionnaires, individual questions, attributes and all
text screens (such as Welcome texts, Instruction texts,
and Thank-you texts).
 Add breaks to a test. You can use a time delay, partially
present a test or allow panelists to stop and restart a test.
 Use Branching to guide panelists through a series of
questions while skipping others depending upon their
response to key questions such as product usage.

23. Using Compusense five software to
select and train panelists members
graph showing the
percentage of
panelist responses
of members to
different sweet
samples .

24. C R E A T I N G U S E R F R I E N D L Y S O F T W A R E F O R
S E N S O R Y A N A L Y S I S
A U T H O R : C . J . , F I N D L AY. 1 9 8 6
Case study

25. Case study
 C.J. Findlay et al. had done a research to integrate
computer in sensory analysis.
 They used IBM-PC, and panelist input was
simplified by using a light pen and interactive
questionnaire program.
 The system was integrated to allow preparation of
descriptive, hedonic , triangle , structured and
unstructured ballots; registration of panelist ;
collection of data; statistical analysis and report
generation.

26.  They found that the computer had a large impact on
data analysis where data collection was still done
manually.
 Even though many attempts were done to
incorporate computer into different aspects of
sensory analysis but they result in either expensive
systems or inflexible.
 Their aim was to develop an integrated sensory
analysis system that would be both user and operator
“friendly”, flexible, comprehensive and relatively
inexpensive.

27.  To develop the system they found that the keyboard
was recognized as barrier to communication with
computer, and the simpler alternatives were mouse,
touch-screen and digitalizer
 But the major drawback of these devices included
eye-to-hand coordination, high expenses, fingerprint
on monitor screen and the continued requirement
for paper ballots.
 So they had chose the light pen for software
developing because of its simplicity , durability, and
precision

28. Mouse and keyboard Ballot Paper
Input methods

29. Light pen Light pen
Input methods

31. Created program has the following capabilities
 When the analyst prepare a questionnaire, the
program uses a menu format to present the design
option. (Example of design is shown in the next
slide.)
 Randomize presentation numbers are generated by
the program and assigned to each sample.
 Presentation of samples is then randomized by
panelist over all the screen in the system.
 The sample number is shown at the end of each line
in the unstructured line scale.

33. Example 1
 The title of the panel session appears at the top of the
screen. The attribute being tested is shown under the
title with extreme description at each end of the line .
 The panelist respond by placing the light pen at the
point on the line that best describe his response to
attribute
 A line marker appears at that point. The mark is
recorded us a number, which computer use in
subsequent data analysis.
 Once finish the testing session the panel list can
select “Quite” out of various option at screen bottom.

34.  If a question is not answered, the program informs
the panelist to complete it.
 Panelist has option at the screen bottom to go for
next and previous screen , and box showing number
of total questions and the questions done.

36. Example 2: Seven point hedonic scale
 The panelist respond by placing the light pen in the
box under the label which best describe the response
to sample. This response is recorded as numerical
value by the computer.

38. The out come of the study
 Panelists were adapted rapidly to the use of the light
pen and found they were able to concentrate on the
product being tested rather than worrying about the
computer system.
 Panelist taken shorter time for the analysis session
 Analysis of variance and printed report were
produced with in 5 minutes of the end of the panel.
 That means “ it was able to cut the time required for
the sensory panel in half. Also the simplicity of the
system and lends itself to rapid learning and
acceptance both by panelist and analyst.”

39.  Negative capabilities of the system ere found when
the panel list couldn't add a comment when he needs
to du to keyboard lacking, but that was overcame by
devising an “on-screen” keyboard that can be typed
by placing the light pen on letters.
 The panel list need to place the light pen at the
comment space so the on-screen keyboard will
appear and then he can place light pen on letters one
by one to write his comment as shown in the next
slide

41. Conclusion
 Computerized sensory evaluation
reduce the time taken to conduct
sensory test and to analyze the data
obtained.
 Computerized sensory evaluation
save the time taken in data entry in
the computer.
 Computerized sensory evaluation
help in reduce the time required to
train a panel member.
 Computerized sensory evaluation is
a necessity when large numbers of
tests per annum are conducted.
 developed Software allow
conducting different types of sensory
evaluation tests

42. Conclusion
cont…
 Computer senses such as E-Nose
and E-Tongue are emerging
techniques that found their
application in different science
fields such as medical filed but
they can not replace human in
sensory evaluation field.
 E-Nose and E-Tongue can be use
as QC tool in Monitoring Product
Quality and in conducting some
routine sensory analysis.