 To estimate the sample size,the investigators conducted a power analysis based on the findings of the previous research. If the investigators take WMFT-quality into account, with an overall effect size of 0.72, a power set at 0.80, and a two-sided type I error of 0.05, the sample size calculation resulted in 32 participants per group. If the investigators take WMFT-time into account, with an overall effect size of 1.66, a power set at 0.80, and a two-sided type I error of 0.05, the sample size calculation resulted in 7 participants per group. Based on the above results and taking into account the possible 10 dropout rate, the investigators plan to recruit 35 participants for each group resulting in a total sample size of 70 patients with stroke. 