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A Reaching Performance Scale for 2 Wolf Motor Function Test Items.

Clarisa Martinez1, Helen Bacon1, Veronica Rowe2

  • 1Division of Biokinesology and Physical Therapy, University of Southern California, Los Angeles, CA.

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|May 21, 2020
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Summary

The adapted Reaching Performance Scale for Stroke (RPSS) for the Wolf Motor Function Test showed moderate agreement for intra-rater reliability and weaker agreement for inter-rater reliability in stroke survivors. This tool may help track movement quality changes after stroke.

Keywords:
Psychomotor performanceRehabilitationStrokeUpper extremity

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Area of Science:

  • Neuroscience
  • Rehabilitation Medicine
  • Motor Control

Background:

  • Stroke often leads to upper extremity motor impairments.
  • The Wolf Motor Function Test (WMFT) is a common assessment tool.
  • The Reaching Performance Scale for Stroke (RPSS) evaluates movement quality.

Purpose of the Study:

  • To adapt the Reaching Performance Scale for Stroke (RPSS) for specific items of the Wolf Motor Function Test (WMFT).
  • To evaluate the inter- and intra-rater agreement and concurrent validity of the adapted WMFT-RPSS.

Main Methods:

  • Retrospective analysis of video-recorded WMFT assessments.
  • Three raters evaluated 29 participants with mild to moderate upper extremity impairment post-stroke.
  • Inter- and intra-rater reliability (Gwet's AC2) and concurrent validity with other motor scales were assessed.

Main Results:

  • Moderate intra-rater agreement (AC2: 0.63-0.70) and weak-to-moderate inter-rater agreement (AC2: 0.56-0.61) were found for the WMFT-RPSS.
  • Significant correlations were observed between WMFT-RPSS scores and measures of movement time, functional ability, and motor impairment.
  • Analysis suggested potential compensatory movements not evident from movement rate alone.

Conclusions:

  • The adapted WMFT-RPSS demonstrates potential as a valid and reliable tool for assessing movement quality in stroke survivors.
  • It may aid in identifying compensatory strategies and tracking longitudinal changes in motor function.
  • Further research can refine its application in clinical settings.