The apparatus (10) compares the ability of multiple players to perform a physical task, and administers a disincentive, for example a measured electric shock to one or more unsuccessful players. In an example, the apparatus comprises a number of handsets (14) with input devices (22). The apparatus compares reaction time of a plurality of players from a start signal, and administers an electric shock to the players with slower, or the slowest, of reaction times via the handset.