1.
Can Confidence Assessment
Enhance Traditional
Multiple-Choice Testing?
Josef Kolbitsch, Martin Ebner, Walther Nagler, Nicolai Scerbakov

2.
Technology enhanced Learning
http://flickr.com/photos/powerbooktrance/289992273//

3.
uLearning
http://www.flickr.com/photos/sovietuk/141381675

4.
„Students sometimes accomplish their results
of a Mutiple-Choice Test by a combination of
partial knowledge and guesswork.“

5.
Confidence Assessment
„Students do not only have to choose an
answer to a multiple-choice question, but also
have to indicate how confident they feel
about their given answer.“

6.
additional confidence paramter

7.
Lecture Design
- lecture „Application of Operating and
Information Systems“
- recommended to all students of Graz
University of Technology
- 720 students attend
- 432 did the final exam

8.
Test Design
100 questions were generated with
following influence by confidence:

9.
Interpretation of the parameter
Points if Points if
Confidence Interpretation
correct incrorrect
100% I know it 10 -5
I am not sure, but I think
66% 7 -3
I know it
I am not sure, but I
33% 3 -2
assume something
I did not know it and I
0% 0 0
have to guess

10.
Test Groups
- Control group (260 students)
- Experimental group with Confidence
(172 students)
- Experimental group without
Confidence (172 students)
- Experimental group scaled (172
students)

11.
Overview about groups
Minimum Maximum Range of
Type of Test
Score Score Points
Experimental group with
-50 100 150
Confidence
Experimental group
0 100 100
without Confidence
Experimental group scaled 0 100 100
Control group 0 100 100

12.
General findings
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13.
Is there a difference between the results of the MCT with
confidence assessment and the result of the Control
Group?
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14.
Is there a difference between the scaled results of MCT
with confidence assessment and the result of the Control
Group?
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15.
Is there a relationship between the confidence parameter
and the correctness of the answer?
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16.
Discussion
- Result of Experimental Group with
Confidence are slightly worse than
those of Control Group
- Result of Experimental Group scaled are
slightly better than those of Control
Group
- Relationship between confidence
parameter and percentage of wrong
answers are highly relevant

17.
„By adding a
confidence
parameter
to a MCT
the result
of the MCT
deteriorates“

18.
SOCIAL LEARNING
Computer and Information Services
Graz University of Technology
Graz University of Technology
Martin Ebner
http://elearning.tugraz.at
http://elearningblog.tugraz.at