Before revision:  We, therefore, replicated a study that reported benefits of haptic interaction between humans on individual motor improvement for tracking a target in a visuomotor rotation . Also , we tested the effect of more interaction time and  stronger haptic coupling between the partners on individual performance improvement in the same task.
After revision:  We, therefore, replicated a study that reported benefits of haptic interaction between humans on individual motor improvement for tracking a target in a visuomotor rotation perturbation. In addition , we tested the effect of more interaction time and stronger haptic coupling between the partners on individual performance improvement in the same task.