If the operator does not have the muscle strength to exit an undesired target, then this could seriously hamper interaction.. Haptic-Assisted Target Acquisition in a Visual Point-and-Click Task for Computer Users with Motion Impairments Article Full-text available Apr 2012 Christopher T.

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Source publication The Effect of Multiple Haptic Distractors on the Performance of Motion-impaired Users Article Full-text available Faustina Hwang Pat Langdon Simeon Keates P.

John Clarkson The effect of multiple haptic distractors on target selection perform- ance was examined in terms of times to select the target and the associated cur- sor movement patterns.

Two experiments examined: a) The effect of multiple haptic distractors around a single target and b) the effect of inter-item spacing in a linear selection task.

It was found. Cite Download full-text Contexts in source publication Context 1.

This device, shown in Figure 1, can generate a wide range of haptic effects, including vibro-tactile sensations and directional forces.

Potential target positions, indicated by faint gray circles on the screen, were lo- cated at the centre and vertices of a regular hexagon with an edge length of 250 pix- els..

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The muscle groups used in generating horizontal move- ments may either be prone to generating greater forces than are necessary for escap-Faustina Hwang et al ing from a distractor, or less suited to rapid damping of the movement after the cursor has escaped the distractor..

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A high level of dexterity is required to accurately position the cursor and maintain stability whilst operating a device switch.

According to Hwang et al.

Previous studies have investigated the use of haptic feedback to assist targeting and cursor navigation...

Target distracters have been highlighted as a major hindrance to the development of haptic assistance (Keates et al., 2002; Hwang et al., 2003; Holbert and Huber, 2008; Asque et al., 2012b).

A target distraction occurs when the cursor has to pass through undesired haptic cues before reaching the destination...

The majority of GUIs have icons arranged in rows or columns, which means that there are often many potential distracters that lie along the task axis.

The cursor trajectories indicated that many corrections were required when exiting distracters and that there was a time penalty associated with consequent oscillation between targets..

Augmenting Graphical User Interfaces with Haptic Assistance for Motion-Impaired Operators Article Oct 2014 INT J HUM-COMPUT ST C.T.

Asque A.M. Day S.D.

Laycock Haptic assistance is an emerging field of research that is designed to improve human-computer interaction (HCI) by reducing error rates and targeting times through the use of force feedback.

Haptic feedback has previously been investigated to assist motion-impaired computer users, however, limitations such as target distracters have hampered its integration with graphical user interfaces (GUIs).

In this paper two new haptic assistive techniques are presented that utilise the 3DOF capabilities of the Phantom Omni.

These are referred to as deformable haptic cones and deformable virtual switches.

The assistance is designed specifically to enable motion-impaired operators to use existing GUIs more effectively.

Experiment 1 investigates the performance benefits of the new haptic techniques when used in conjunction with the densely populated Windows on-screen keyboard (OSK).

Experiment 2 utilises the ISO 9241-9 point-and-click task to investigate the effects of target size and shape.

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The results of the study prove that the newly proposed techniques improve interaction rates and can be integrated with existing software without many of the drawbacks of traditional haptic assistance.

Deformable haptic cones and deformable virtual switches were shown to reduce the mean number of missed-clicks by at least 75 and reduce targeting times by at least 25.

View. Many disabled computer users find traditional input devices difficult to use.

A haptic device offers potential assistance in these areas but so far has not been utilized to its full potential...

Previous studies have highlighted these as a concern when using gravity wells and highfriction targets with a 2 DOF device 1 7.

If the operator does not have the muscle strength to exit an undesired target, then this could seriously hamper interaction..

Haptic-Assisted Target Acquisition in a Visual Point-and-Click Task for Computer Users with Motion Impairments Article Full-text available Apr 2012 Christopher T.

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