A Behavioral Observation System for Quantifying Arm Activity in Daily Life After Stroke

Academic Article


  • Objective: Evaluate psychometric properties of the Functional Arm Activity Behavioral Observation System (FAABOS) for measuring hemiparetic arm use. Participants and Measures: All participants acquired their brain injury > 1 year prior to study entry; most had mild-to-moderate upper-extremity hemiparesis. In Study 1, 9 stroke survivors wore accelerometers and were videotaped for 15 min in the hospital or at home after they were asked to behave as usual. In Study 2, 1 traumatic brain injury and 8 stroke survivors wore accelerometers and were videotaped at home for 3 days with a motion-triggered camera. Observers independently rated 15-min segments of the Study 1 and 2 videotapes in 2-s blocks with a 4-step arm-activity coding scheme. Results: Interrater reliability was excellent; the mean Cohen's κ in each study was ≥ .84. For data from both studies combined, validity was supported by a strong correlation between amount of hemiparetic arm functional activity, as determined by the observers, and the ratio of hemiparetic to other arm movement, as determined by accelerometry. Conclusion: FAABOS reliably and validly quantifies amount of spontaneous hemiparetic arm activity outside the laboratory. © 2009 American Psychological Association.
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    Digital Object Identifier (doi)

    Author List

  • Uswatte G; Qadri LH
  • Start Page

  • 398
  • End Page

  • 403
  • Volume

  • 54
  • Issue

  • 4