Related Experiment Video
Updated: Dec 13, 2025
Home-Based Monitor for Gait and Activity Analysis
Published on: August 8, 2019
Construct validity of the Actiwatch-2 for assessing movement in people with profound intellectual and multiple
Helena J M van Alphen1, Aly Waninge2, Alexander E M G Minnaert1
1Department of Inclusive and Special Needs Education, University of Groningen, Groningen, the Netherlands.
Background:
Valid measures to assess either small or assisted performed movements of people with profound intellectual and multiple disabilities (PIMD) are required. We analysed the construct validity of the Actiwatch-2 to assess movement in people with PIMD.
Method:
Twenty-two persons with PIMD were video recorded while wearing an Actiwatch-2. We used 15s-partial-interval recording to record upper body movement, body position and activity situation. Multilevel analyses were used to evaluate if the Actiwatch-2, based on produced counts, could detect changes in these factors.
Results:
The presence versus absence of upper body movement and an activity situation in which participants were involved versus not involved resulted in significantly higher counts, with a large variety in predicted counts between participants. No relationship between body position and counts was found.
Conclusions:
The Actiwatch-2 seems able to assess obvious upper body movement in people with PIMD, and whether there is involvement in an activity situation.
