Specific Aim 1: Estimate the effectiveness of using an assistive repetitive motion device (ARM) in conjunction with repetitive task practice (RTP) on motor recovery of patients with sub-acute stroke. This aim will be examined by comparing pre-intervention motor performance levels with the immediate post-intervention and two months post-intervention. The primary outcome variables will be scores on the Fugl-Meyer Motor Assessment Test (FMA) and Wolf Motor Function Test (WMFT). We hypothesize patients in the RTP + ARM group will exhibit greater gains in upper extremity motor recovery/performance than the RTP and ARM only groups.