The main goal of the study is to examine the effect of rewards on the behavior of players in a team activity. In this framework, by performing 12 sequential and simultaneous games in a laboratory environment examine the rewarding effect on playerschr('39') behavior. Students from Yazd universities surveyed and the sample of 182 students is in the form of two groups, which collected in total for 2184 matches in 12 games. The results show that the increase in game rewards leads to a reduction in the playerchr('39')s first attempt in the game. Also, the structure of the game for simultaneous or sequential decision making does not affect the decision of the first player, but the decision of the second player is affected. In addition, the reciprocal effects of rewards and structure only affect the decision of the second player.