Abstract
Euler diagrams are often used for visualizing data collected into sets. However, there is a significant lack of guidance regarding graphical choices for Euler diagram layout. To address this deficiency, this paper asks the question ‘does the shape of a closed curve affect a user’s comprehension of an Euler diagram?’ By empirical study, we establish that curve shape does indeed impact on understandability. Our analysis of performance data indicates that circles perform best, followed by squares, with ellipses and rectangles jointly performing worst. We conclude that, where possible, circles should be used to draw effective Euler diagrams. Further, the ability to discriminate curves from zones and the symmetry of the curve shapes is argued to be important. We utilize perceptual theory to explain these results. As a consequence of this research, improved diagram layout decisions can be made for Euler diagrams whether they are manually or automatically drawn
Original language  English 

Title of host publication  Diagrams 2014 
Place of Publication  Australia 
Pages  123137 
Number of pages  15 
Volume  8578 
DOIs  
Publication status  Published  1 Jan 2014 
Event  Diagrams 2014  Melbourne, Australia, 28 July  1 August 2014 Duration: 1 Jan 2014 → … 
Publication series
Name  Lecture Notes in Computer Science 

Conference
Conference  Diagrams 2014 

Period  1/01/14 → … 
Bibliographical note
The final publication is available at Springer via http://10.1007/9783662440438_16Fingerprint
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Andrew Blake
 School of Computing, Engineering & Maths  Senior Lecturer
 Centre for Secure, Intelligent and Usable Systems
Person: Academic