Motor performance comparison for the three experimental groups. Figure 3a displays the average distance (mm) for the hit-distance for the three groups in the different categories of movement manipulations. There is no statistical difference between the three groups (p = 0.389). 3b depicts the averaged time (ms) it takes for the three groups to complete the different movement manipulations. The * represents a significant (p < 0.03) difference between the CP children and one or both of the healthy groups and the "represents the significant difference between the healthy children and the healthy adults. 3c illustrates the curvature (mm-1) for the three groups during the different movement manipulations. The * and "represent significant difference between the CP children and the two healthy groups and the healthy children and the healthy adults (p < 0.003). The greater the curvature is, the more the deviations from a straight line occur for the visual moving object to reach the target. 3d shows the average drift (mm) for the three groups during the individual movement manipulations. The drift is a measure of how much the subjects are deviating or compensating for the computer manipulation of the visual objects in the reverse direction. As there is no computer manipulation at Free Move, the Drift is zero. The greater the score, the more the subjects have tried to compensate for the deviation of the visual object. The * represents a significant difference between the CP children and the both of the healthy groups, and the "indicates a significant difference the healthy adults and the healthy children (p < 0.05).