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Title:
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USER PERFORMANCE IN BLIND INTERACTION WITH GRAPHS ASSISTED WITH DIRECTIONAL-PREDICTIVESIGNALS OF DIFFERENT MODALITIES |
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Author(s):
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Tatiana G. Evreinova , Grigori Evreinov , Roope Raisamo |
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ISBN:
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978-972-8924-85-0 |
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Editors:
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Katherine Blashki |
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Year:
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2009 |
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Edition:
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Single |
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Keywords:
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Graph grasping creativity, non-visual interaction, cross-modal coordination, directional-predictive signals |
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Type:
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Full Paper |
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First Page:
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129 |
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Last Page:
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136 |
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Language:
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English |
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Cover:
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Full Contents:
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click to dowload 
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Paper Abstract:
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Visually challenged students need special educational tools which allow them to access graphically presented information
on PDA and desktop platforms. In our previous research, we measured and compared the performance of the stylus
movements when eight blindfolded subjects inspected hidden graphic images assisted with directional-predictive sounds
(DPS) and directional-predictive vibrations (DPV), taking into account exploration behavior and the different capture
radius. There was found a statistically significant difference between the average number of DPS and DPV and task
completion time spent to discover the features of hidden graphs. In present study, the performance achieved with the
same blindfolded subjects involved in previous research was evaluated and compared with that achieved when
directional-predictive electro-tactile patterns (DPeTP) signals were used. The experimental findings confirmed the
beneficial use of DPeTP in comparison with DPS and DPV in the task when cross-modal coordination should benefit the
user in the absence of visual information. |
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