Comparison of mean subject performance in task parameters between arms. (a) Deceleration time. Control subject performance is shown by the grey dots with the x-value for the non-dominant arm (NDA) and the y-value for the dominant arm (DA). Performance of subjects with stroke is shown by the leftward and rightward facing triangles representing left-affected and right-affected subjects (respectively) with x-values for the affected arm (AA) and the y-values for the unaffected arm (UA). Subjects with stroke whose performance is above or below the 95th of control performance (dashed lines) for both arms are represented by green or black triangles, respectively. Subjects with stroke who exceeded the 95th of control performance for with their affected or unaffected arms only are represented by red or blue triangles, respectively. (b) Mean endpoint error for both arms. Dashed lines represent the 95th percentile of control performance for the minimum and maximum age according to the age normative model. (c) Mean return time. Dashed lines represent the minimum and maximum possible 95th percentile of control performance as according to the sex specific normative models.