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Design and implementation of the mobility assessment tool: software description.

Ryan T Barnard1, Anthony P Marsh, Walter Jack Rejeski

  • 1Department of Biostatistical Sciences, Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, NC, USA. rybarnar@wakehealth.edu

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Summary

A new XML framework enables flexible creation and deployment of mobility assessment tools. This approach simplifies instrument definition and broadens reach across multiple platforms for wider use.

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Area of Science:

  • Gerontology
  • Geriatric Medicine
  • Human-Computer Interaction
  • Psychometrics

Background:

  • Previous development of an 81-item video-animated mobility assessment tool.
  • Pilot study feedback highlighted the need for a more flexible instrument framework.

Purpose of the Study:

  • To develop a new, flexible framework for designing and administering psychometric instruments.
  • To create a software-independent method for defining and deploying assessment tools.

Main Methods:

  • Designed an XML schema to describe various psychometric instruments.
  • Defined a video-animated mobility assessment tool within an XML document.
  • Developed two software applications (Java and Objective-C for iPad) to interpret the XML and collect responses.

Main Results:

  • Separated instrument definition from software implementation, enabling rapid iteration.
  • Created a flexible framework allowing easy and reliable definition of instrument variations.
  • Demonstrated the ability to deploy a single instrument definition across multiple platforms.

Conclusions:

  • Software-independent XML document definition simplifies instrument creation and variation.
  • A single instrument can be deployed on multiple platforms, broadening the target audience.
  • Future work will refine the specification to encourage adoption in gerontology and geriatric medicine research.