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Modeling Gliding-based Target Selection for Blind Touchscreen Users.

Yu-Jung Ko¹, Shirin Feiz¹, I V Ramakrishnan¹

¹Department of Computer Science, Stony Brook University, USA.

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|August 7, 2023

Summary

This summary is machine-generated.

Blind screen-reader users employ two gliding strategies for touch exploration: corrective ballistic movements and segmented sub-movements. A new model accurately predicts their motor performance, enhancing interface design.

Keywords:

accessibility gliding-based target selection pointing

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Area of Science:

Human-Computer Interaction
Accessibility Research
Motor Control

Background:

Touch exploration is a primary interaction method for blind screen-reader users.
Existing models do not fully capture the nuances of their gliding behavior.

Purpose of the Study:

To investigate the gliding trajectories of blind screen-reader users.
To develop a predictive model for their touch exploration motor performance.

Main Methods:

Analysis of gliding trajectories during touch exploration.
Development and validation of the mixture pointing model.

Main Results:

Identified two distinct gliding strategies: iterative corrections and segmented sub-movements.
The proposed mixture pointing model significantly outperforms Fitts' law (R² 0.76 vs. 0.65).
Model shows superiority in cross-validation and information criteria.

Conclusions:

The mixture pointing model enhances the understanding of gliding-based target selection for visually impaired users.
This model can inform the design of more effective interface layouts for screen-reader based touch exploration.