The reliability of the wolf motor function test for assessing upper extremity function after stroke

Arch Phys Med Rehabil. 2001 Jun;82(6):750-5. doi: 10.1053/apmr.2001.23183.


Objective: To examine the reliability of the Wolf Motor Function Test (WMFT) for assessing upper extremity motor function in adults with hemiplegia.

Design: Interrater and test-retest reliability.

Setting: A clinical research laboratory at a university medical center.

Patients: A sample of convenience of 24 subjects with chronic hemiplegia (onset >1yr), showing moderate motor impairment.

Intervention: The WMFT includes 15 functional tasks. Performances were timed and rated by using a 6-point functional ability scale. The WMFT was administered to subjects twice with a 2-week interval between administrations. All test sessions were videotaped for scoring at a later time by blinded and trained experienced therapists.

Main outcome measure: Interrater reliability was examined by using intraclass correlation coefficients and internal consistency by using Cronbach's alpha.

Results: Interrater reliability was.97 or greater for performance time and.88 or greater for functional ability. Internal consistency for test 1 was.92 for performance time and.92 for functional ability; for test 2, it was.86 for performance time and.92 for functional ability. Test-retest reliability was.90 for performance time and.95 for functional ability. Absolute scores for subjects were stable over the 2 test administrations.

Conclusion: The WMFT is an instrument with high interrater reliability, internal consistency, test-retest reliability, and adequate stability.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Arm
  • Chronic Disease
  • Diagnostic Techniques, Neurological*
  • Female
  • Hemiplegia / diagnosis*
  • Hemiplegia / etiology
  • Hemiplegia / rehabilitation
  • Humans
  • Male
  • Middle Aged
  • Motor Skills*
  • Observer Variation
  • Reproducibility of Results
  • Stroke / complications
  • Stroke Rehabilitation*