A study on the straight-line drawing tasks for the non-sighted people

Authors:
Chih-Fu Wu;Cherng-Yee Leung;Yung-Hsiang Tu;Kuang-Chieh Hsu;Huei-Tang Lin
Affiliations:
Faculty, Department of Industrial Design, Tatung University, Taipei, Taiwan;Faculty, Department of Industrial Design, Tatung University, Taipei, Taiwan;Faculty, Department of Industrial Design, Tatung University, Taipei, Taiwan;Department of Industrial Design, Tatung University, Taipei, Taiwan;Department of Industrial Design, Tatung University, Taipei, Taiwan
Venue:
UAHCI'07 Proceedings of the 4th international conference on Universal access in human-computer interaction: applications and services
Year:
2007

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Abstract

A new ruler employs the finger touch to be the main pointing sensor with two locators at the two ends, and a unique pen in a smooth track to draw a line. The tasks of making straight line with two difference rulers (Ruler S: ruler used at school; Ruler C: new touch ruler) between non-sighted people (blindfolds and blinds) were observed: (1) free-line; (2) constrained-line; (3) extension-line; (4) closing-line; and (5) conjoining-line. Stages of those tasks were measured: searching, positioning, plotting, and checking, with reacting time and the deviation. The Paired t-test shown Ruler S had a larger reacting time for blinds at task (4), (5). MANOVA shown the blinds had larger reacting time at task (3), while (5) on deviation; Ruler C had a larger error at start- point of task (3) and a larger length error of task (3); while Ruler S had a larger error at end-point of task (4). Conclude that some revised design of the ruler really affected the performance of the straight-line tasks, while some did not.