A new computer game-based hand-arm function evaluation (GHA) tool has been established to quantify fine and gross object manipulation skills, movement quality, accuracy, response time, and movement variation. The tool can be used with numerous objects with various geometric/surface properties, functional and anatomical demands. The purpose of this study was to determine the test-retest reliability and convergent validity (WMFT) of the GHA assessment tool. We hypothesized a high test-retest reliability and a moderate convergent validity.
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