Response strategies in joint force perception tasks.

<p><i>A</i>: the external force is approximately equally split between the two participants. Both use the corresponding interaction force to respond independently. <i>B</i> and <i>C</i>: the <i>thick</i> and <i>dashed arrows</i> represent the strong and weak interaction force in a dyad where the external force is split unequally. In both cases, participant 1 balances the whole external force while participant 2 experiences almost no force.