Interaction in Mass Education 
Martin Ebner
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martin.ebner 
http://www.martinebner.at 
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mebner 
http:// 
elearningblog. 
tugraz.at
Future? 
http://pizdaus.com/pics/MC3KUw7uCDtL.jpg
Interaction with a mass of students 
• Feedback Lag 
• Student Apprehension 
• Single Speaker Paradigm
Before we start … 
… we do a live test …
http://backchannel.cnc.io 
provide following code: S J H N Q
http://backchannel.cnc.io 
provide following code: S J H N Q
Audience Response Systems (ARS) 
Digital Frontchannel Digital Backchannel 
qualitative quantitative qualitative quantitative 
Voting 
system with 
any text 
Voting 
system with 
multiple 
choice 
Feedback 
system with 
any text 
Feedback 
system with 
defined 
options
http://realfeedback.io 
provide following code: H W G L P
http://realfeedback.io 
provide following code: H W G L P
Architecture of the systems
Real-life experiences
... Anwendung in der 
Google-Glass-Brille .... 
Backchannel
Different&Aging&Approaches& 
... Anwendung in der 
Google-Glass-Brille .... 
value&[%]& 
50$ 
40$ 
30$ 
20$ 
10$ 
0$ 
!10$ 
!20$ 
!30$ 
*me&[minutes]& 
Backchannel 
0$ 2$ 4$ 6$ 8$ 10$ 12$ 14$ 16$ 18$ 20$ 22$ 24$ 26$ 28$ 30$ 32$ 34$ 36$ 38$ 40$ 
speed$(no$aging)$ speed$(linear$aging)$ speed$(quadra:c$aging)$
Backchannel 
• Students love it 
• Easy to use, fast and impressive feedback 
• Hard to follow for the teacher (second screen) 
• Problem of appropriate reaction
Realfeedback
Realfeedback 
Teacher are using it … 
• … before the lecture starts (repetition) 
! 
• … during the lecture (assessment) 
• … during the lecture (for discussions in groups) 
• … to discuss homework
Realfeedback 
• Students attention is very high 
• Easy to use and great overview 
• Questions must be prepared beforehand 
• It needs time
Conclusion 
• ARS system are interesting option to 
enhance interaction in huge lecture halls 
• Use of ARS system need a solid didactical concept 
• Use of ARS system is a challenging task for 
lecturers
... our next approach ....
Slides available at: http://elearningblog.tugraz.at 
SOCIAL LEARNING 
Computer and Information Services 
Graz University of Technology 
Graz University of Technology 
Martin Ebner 
martin.ebner@tugraz.at 
http://elearning.tugraz.at 
mebner

Interaction in mass education