The aim of the study is to examine associations between contextual interference (CI), engagement during practice and changes in upper limb motor performance among patients post-stroke. Fifty patients over the age of 18, after a stroke, in the sub-acute and early chronic stages who have weakness of the upper extremity and are treated in a rehabilitation center will be recruited. The study will include participation in five sessions: session 1 for baseline assessment, session 2-4 for practice of upper extremity functions, and session 5 for post intervention assessment. The intervention will include training of three items from the Wolf motor function test in random order (high CI group) or block order (low CI group). Outcomes of engagement will include the brain engagement index, heart rate variability and galvanic skin response. Outcomes of learning will include the pre-post change in performance of the wolf motor function selected items.
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Change in Brain Engagement Index
Timeframe: Practice session 1 (1-2 days following pre-intervention session), practice session 2 (1-2 days following practice session1), and practice session 3 (1-2 days following practice session1)
Change in time to complete each of three items of the Wolf Motor Function Test (WMFT)
Timeframe: Pre-intervention session (first session), post-intervention session (session 5, 5-7 days following the pre-intervention session))