Topic: movement vigor

Movement vigor changes with reward magnitude: movements exhibit shorter reaction time and increased velocity when directed toward more rewarding options. But what if the reward is turned down? In interactive economic games, people often choose to punish unfair proposers, even when the punishment is personally costly. How vigorously do they move in punishing unfair offers? Is vigor proportional to the incurred self-cost? Or does it rather reflect the cost inflicted on the unfair other? Here, we combined experimental economics and kinematics to address these questions. In study 1, we used motion