H OLIB RAILLE
HUGO NICOLAUKYLE MONTAGUE, TIAGO GUERREIRO
ANDRÉ RODRIGUES, VICKI L. HANSON
motivation :: non-visual input
motivation :: braille input
motivation :: braille output
problem :: braille output
contribution :: holibraille
application :: deaf-blind
application :: typing feedback
application :: privacy & security
holibraille :: design & hardware
holibraille :: localized feedback
holibraille :: localized feedback
evaluation :: character discrimination
11 blind participants
evaluation :: procedure
1. Audio signal
2. Delay (2 seconds)
3. Random braille character (from 26 letters)
4. Answer
5. Monitor register answer
26 le
tte
rs x
2 b
locks
results :: fingers vs. accuracy
A B F L
N Y Z
100
%
100
%
96% 96%
48% 39% 30%
results :: 61% - 1 finger errors
P Fomission
S Tinsertion
results :: finger-dependent errors
35%
18%
discussion :: overall accuracy
10 min. practice
overall - 73%
< 4 dots – 89%
discussion :: feedback design
braille21.com
HUGO NICOLAUpaper and slides @ http://web.ist.utl.pt/hugo.nicolau