This is the slideshow from the talk I gave to present our research paper accepted to the NordiCHI 2014 conference.

1. Belly Gestures: Body Centric
Gestures on the Abdomen
Dong-Bach Vo 1,2, Eric Lecolinet 2, Yves Guiard 2
1 University of Glasgow, United Kingdom
2 Télécom Paristech, France

2. Motivation
2

3. On-body interaction
3
!
• Always available
!
• Eyes-free interaction
• Proprioception
• Tactile feedback

4. Related work
4
[Harrison et al., 2010]
[Sato et al., 2012]
[Bailly et al., 2012]
[Holz et al., 2012]

5. Related work
5
[Serrano et al., 2014]
[Lin et al., 2011]

6. Related work
6

7. Related work
7
« Participants were most efficient with
targets on the torso […] »
[Wagner et al. 2013]

8. Related work
8
« This would make the sternum well
suited […] to be used during sports. »
[Karrer et al. 2011]

9. Abdomen as an interactive surface
9
Relatively large Easy access Stable Intimate

10. Mental spatial representation
Perception of cutaneous stimuli [Parsons & Shimojo,
1987]
!
10

11. 11
« Without looking at your abdomen,
how would you draw the number two on it
with your right hand? »

12. User experiment
Inversion relative to vertical axis
No
Yes No
Yes
Inversion relative to horizontal axis
A B
C D
12
Two
• 12 users
• 2 factors: nature x presentation
• Subjective preferences questionnaire

13. Experimental design
13
Up Up
Right
Right Down
Right
Down Down
Left
Left Up
Left
One Two Three Four Five Six Seven Eight Nine Zero
Textual Graphical Textual Graphical
Directional Material
Digit Material

14. Possible spatial representations
14
Inversion relative to vertical axis
No
Yes No
Yes
Inversion relative to horizontal axis
A B
C D

15. Possible spatial representations
15
Inversion relative to vertical axis
No
Yes No
Yes
Inversion relative to horizontal axis
A B
C D

16. Possible spatial representations
16
Inversion relative to vertical axis
No
Yes No
Yes
Inversion relative to horizontal axis
A B
C D

17. Rates of inversions relative to axes
17
Digit Direction
0.4
0.2
0.0
Graphical Textual Graphical Textual
Axis
Horizontal
Vertical

18. Rates of inversions relative to axes
18
Digit Direction
0.4
0.2
0.0
Graphical Textual Graphical Textual
Axis
Horizontal
Vertical

19. Rates of inversions relative to axes
19
Digit Direction
0.4
0.2
0.0
Graphical Textual Graphical Textual
Axis
Horizontal
Vertical

20. Rates of inversions relative to axes
20
Digit Direction
0.4
0.2
0.0
Graphical Textual Graphical Textual
Axis
Horizontal
Vertical

21. Subjective preferences
21
6
4
2
0
Easy Fast Pleasant Precise Tiring
Material
Digit
Direction

22. How users perform directional gestures?
22

23. Linearity of directional gestures
23
1.00
0.95
0.90
EAST
NORTH EAST
NORTH
NORTH WEST
WEST
SOUTH WEST
SOUTH
SOUTH EAST

24. Linearity of directional gestures
24
1.00
0.95
0.90
EAST
NORTH EAST
NORTH
NORTH WEST
WEST
SOUTH WEST
SOUTH
SOUTH EAST
Extension
Flexion

25. Mean directional biases of gestures
25
0
45
90
135
180
225
270
315
EAST
SOUTH EAST
SOUTH
SOUTH WEST
WEST
NORTH WEST
NORTH
NORTH EAST

26. Design recommendations
• Favor directional gestures when possible
!
• Provide to users means to select up/down
direction preferences
!
• Favor rotation invariant symbols for complex
gestures
!
• Gesture design should take into account
efforts to move the arm
26

27. Thank you
27
Belly Gestures: Body Centric
Gestures on the Abdomen
Dong-Bach Vo 1,2, Eric Lecolinet 2, Yves Guiard 2
1 University of Glasgow, United Kingdom
2 Télécom Paristech, France
dong-bach.vo@glasgow.ac.uk