A Usability Study of Nomon: A Flexible Interface for Single-Switch Users

Many individuals with severe motor impairments communicate via a single switch—which might be activated by a blink, facial movement, or puff of air. These switches are commonly used as input to scanning systems that allow selection from a 2D grid of options. Nomon is an alternative interface that provides a more flexible layout, not confined to a grid. Previous work suggests that, even when options appear in a grid, Nomon may be faster and easier to use than scanning systems. However, previous work primarily tested Nomon with non–motor-impaired individuals, and evaluation with potential end-users was limited to a single motor-impaired participant. We provide a usability study following seven participants with motor impairments and compare their performance with Nomon against a row-column scanning system. Most participants were faster with Nomon in a picture selection task, while entry rates varied more in a text-entry task. However, we found participants had to click more times per selection using Nomon, motivating future research into mitigating this increased click load. All but one participant preferred using Nomon; most reported it felt faster and had better predictive text.

Name thesis:degree_name

Master

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2023

Author dc:creator

• Bonaker, Nicholas Ryan

Advisor dc:contributor.advisor

• Broderick, Tamara

Statement dc:rights

• In Copyright - Educational Use Permitted
• Copyright retained by author(s)

Licence dc:rights.uri

• https://rightsstatements.org/page/InC-EDU/1.0/

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/152707

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/152707