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Assessing Mobile  Touch Interfaces  for Tetraplegics
 

Assessing Mobile Touch Interfaces for Tetraplegics

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    Assessing Mobile  Touch Interfaces  for Tetraplegics Assessing Mobile Touch Interfaces for Tetraplegics Presentation Transcript

    • Assessing Mobile Touch Interfaces for Tetraplegics Tiago Guerreiro Hugo Nicolau Joaquim Jorge Daniel Gonçalves
    • Mobile evolution …
    • Leading to …Touch Interfaces
    • pleasant
    • Tactile feedbackloss of tactile feedback
    • Loss of physical stability
    • hard to select targets
    • it occurs to everyone
    • … and motor impaired
    • require less strength
    • Adapt to users’ needs
    • Provide the knowledge tobuild better touch interfaces
    • We performed …
    • Tested several … Interaction Techniques
    • Screen areas … … corners
    • Screen areas … … edges
    • … and target sizes 7 mm 12 mm 17 mm
    • Tapping
    • Crossing
    • Exiting
    • Gesturing
    • 15 participants 28-64 years old C4-C7 lesion level 6 left-handednever used touchscreens
    • Focus on …Tapping
    • Target Size H0Target size has no influence on task errors
    • Target Size
    • Target Size H0Target size has no influence on task errors [F=25.110 p<.001]
    • Corner Targets H0Task errors are not dependent on the target’s position (corner vs center)
    • Corner Targets 7mm 12mm 17mm 35% 35% 27% 27% 22% 22% 45% 24% 20% 35% 35% 27% 27% 22% 22%
    • Corner Targets H0Task errors are not dependent on the target’s position (corner vs center) [p>.05]
    • Edge Targets H0Task errors are not dependent on the target’s position (edge vs center)
    • Edge Targets 7mm 12mm 17mm 45% 23% 22% 40% 26% 19% 45% 45% 23% 23% 22% 22% 45% 23% 22%
    • Edge Targets H0Task errors are not dependent on the target’s position (edge vs center) [p>.05]
    • Edge Targets 7mm 12mm 17mm 53% 27% 20%Left 61% 33% 28% 11% 24% 22% 11% 11% 22% 37% 30% 13% 44% 33% 31%Right 37% 44% 41% 41% 27% 7% 52% 23% 18% 53% 11% 7%
    • Vertical Areas H0Task errors are not dependent on the target’s position (top vs bottom vs center)
    • Vertical Areas 7mm 12mm 17mm 45% 28% 27% 39% 28% 24% 43% 19% 12%
    • Vertical Areas H0Task errors are not dependent on the target’s position (top vs bottom vs center) Largest [p<.05] Medium [p<.01]
    • Suggestions for...Tapping
    • Regarding target size … 12 mm
    • However, error rates are still … High
    • Regarding target position …Support
    • Future Work Remaining interaction techniques Differences between able-bodied and tetraplegics
    • The EndHugo Nicolauhman@vimmi.inesc-id.pt