transcript
- 1. Mithileysh Sathiyanarayanan and Nikolay Burlutskiy
University of Brighton, UK {M.Sathiyanarayanan,
N.Burlutskiy}@brighton.ac.uk COMSNETS 2015 Bangalore, India Design
and Evaluation of Euler Diagram and Treemap for Social Network
Visualisation
- 2. Purpose of Social Network Visualisation Identifying the
actors of a network Understanding relationships in a network
Aggregating the information on a social network For example:
network diagram (graph)
- 3. Motivation Since these days people communicate everyday via
social networks such as Facebook, Twitter, LinkedIn, Instagram etc.
There is a big need of visualising tools for the data analysts.
However, the complexity and scale of digital communication
motivates people to find alternative ways to represent social
networks in visual form which are more efficient for specific
reasoning tasks.
- 4. What is the challenge? In this research, visualisation of a
social network using a network diagram is challenged by
visualisation using a treemap and Euler diagram. The main
motivations for this challenge is to understand when the two
visualisations are useful and appropriate for social network
visualisation and what kind of diagram combination would enhance
the visualisation of social networks.
- 5. Network diagram is challenged by visualisation using a
treemap and Euler diagram. Diagrams Network Diagram Euler Diagram
Treemap Diagram
- 6. Addressing the Problem First, Euler diagram and treemap
visualisations were designed for a Twitter network and then
compared by twenty participants in an evaluation. Then two combined
diagrams, an Euler diagram with network diagram, and a treemap with
network diagram were designed and evaluated by the participants.
Finally, the results for the evaluation of a Twitter network
visualisation are demonstrated and discussed.
- 7. Design of the Study Diagrams were drawn using the software
Inkscape. We considered three different sizes of curves/rectangles:
small, medium and large. 20 participants were randomly selected
from the University of Brighton for the study. Fifteen of the
participants were male, five female, and their age varied from 21
to 29 years with 23.5 years as the mean value for their age. Next,
all participants were asked questions based on the visualisations.
Diagrams drawn were randomised for the participants.
- 8. Goal of the Designed Evaluation GOAL 1: To evaluate the
users preference of social network visualisation from two different
visualisations, namely Euler diagram and treemap. Euler Diagram
Treemap Diagram
- 9. Goal of the Designed Evaluation GOAL 2: To evaluate the
choice between an Euler diagram and treemap for conveying
information about peoples interests. Euler Diagram Treemap
Diagram
- 10. Goal of the Designed Evaluation GOAL 3: To evaluate the
choice between an Euler diagram and treemap augmented by network
diagrams for conveying information about peoples interests. Euler
Diagram with network diagram Treemap Diagram with network
diagram
- 11. Section A Comparing Euler Diagram and Treemap Representing
Friendship Relationships between People How many people are in the
network? How many friendship connections exist in the network?
Which person has the most tweets? How many connections Adam has?
Are Steve and Adam connected?
- 12. Section A: diagrams Euler Diagram Treemap Diagram Level of
complexity 6 actors. We also had 4 and 8 actors for the study.
- 13. Section B Comparing Euler Diagram and Treemap Representing
Peoples Interests What are the common interests between John and
Luke? What are the common interests between Robin and Luke? What
are the common interests between John and Steve?
- 14. Section B: diagrams Euler Diagram Treemap Diagram Level of
complexity 6 actors. We also had 4 and 8 actors for the study.
- 15. Section C Comparing two Combined Diagrams Representing
Peoples Interests Luke follows Tom Cruise and how many people Tom
Cruise follows? Who are the common people Adam follows with Luke?
How many people Luke follows which does not include common with
Robin?
- 16. Section C: diagrams Euler Diagram Treemap Diagram Level of
complexity 6 actors. We also had 4 and 8 actors for the study.
- 17. Results
- 18. Discussion Results of GOAL 1: evaluation comparing Euler
diagram and treemap representing friendship relationship between
people, the results showed that Euler diagram performed better than
treemap Euler Diagram Treemap Diagram Mean Rating (out of 5) 4.6
4.0 Error rate 4% 17%
- 19. Discussion Results of GOAL 2: evaluation comparing Euler
diagram and treemap representing peoples interest, the results
showed that again Euler diagram performed better than treemap.
Euler Diagram Treemap Diagram Mean Rating (out of 5) 4.5 3.1 Error
rate 13% 37%
- 20. Discussion Results of GOAL 3: evaluation comparing two
combined diagrams representing peoples interest. The results showed
that Euler diagram augmented by a network diagram performed better
than a treemap augmented by a network diagram. Euler Diagram with
network diagram Treemap Diagram with network diagram Mean Rating
(out of 5) 4.6 3.1 Error rate 13% 35%
- 21. Future Works Other alternative ways of social network
representation based on Euler diagrams and treemaps are considered
for addressing the scalability issue. Redesign the augmented
treemap with changed semantics and including interaction in the
visualisation. Fusion of different visualisation styles is the
research goal for the future since it can spark efficiency of
social network visualisation. In the next study, we will use
crowdsourcing for evaluation of the visualisations since the
results obtained with 20 participants of this study must be
verified for larger groups of participants.
- 22. Thank You and Any Questions?