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Related Experiment Video

Updated: Jul 22, 2025

A Human-machine-interface Integrating Low-cost Sensors with a Neuromuscular Electrical Stimulation System for Post-stroke Balance Rehabilitation
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Evaluating the usability of a co-designed power assisted exercise graphical user interface for people with stroke.

Rachel Young1, Karen Sage2, David Broom3

  • 1Department of Allied Health Professions, Advanced Wellbeing Research Centre, Sheffield Hallam University, 2 Old Hall Road, Sheffield, S9 3TU, UK. r.young@shu.ac.uk.

Journal of Neuroengineering and Rehabilitation
|July 24, 2023
PubMed
Summary

This study evaluated a graphical user interface (GUI) for power-assisted exercise (PAE) equipment for people with stroke (PwS). Remote testing improved rehabilitation technology development by identifying and addressing GUI usability issues.

Keywords:
Assistive technologyCo-designGraphical user interfacePower assisted exerciseRehabilitation technologyStrokeUsability evaluation

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Area of Science:

  • Rehabilitation Engineering
  • Human-Computer Interaction
  • Assistive Technology

Background:

  • Digital advancements in power-assisted exercise (PAE) equipment can enhance exercise prescription for individuals with stroke (PwS).
  • Remote usability evaluation of a co-designed graphical user interface (GUI) was conducted.
  • Video-conference software was utilized to expand participant reach in rehabilitation technology testing.

Purpose of the Study:

  • To evaluate the usability of two sequential versions of a co-designed GUI for PAE equipment.
  • To identify and address usability issues through iterative design.
  • To assess the effectiveness of remote usability testing methods.

Main Methods:

  • A mixed-methods approach was employed, recruiting professional users (PU) and expert users (EU).
  • Data collection included usability observations, 'think aloud' walkthroughs, task completion rates, task duration, and user satisfaction (PSSUQ).
  • Usability issues identified in version 1 informed the design of version 2.

Main Results:

  • Version 1 had 22 usability issues identified from 100 occurrences; all tasks were completed successfully.
  • Version 2 addressed eight issues from version 1, but introduced 24 new issues.
  • Significant decrease in task duration for the EU group in version 2 (P=0.03); PSSUQ scores improved for both groups in version 2.

Conclusions:

  • Iterative GUI design effectively addressed usability issues, enhancing the PAE experience for PwS.
  • Version 2 testing revealed new usability challenges within the added submenu.
  • Synchronous, remote usability testing via video-conference software proved effective and is a viable alternative to in-person testing.