The impact of noise on iterated prisoner's dilemma with multiple levels of cooperation

Real world dilemma rarely involved just two choices and perfect interactions without mistakes. In extending the realism of the iterated prisoner's evolutionary approaches included intermediate choices or mistakes (noise). This study takes a step further using a coevolving population of neural networks playing the IPD game with both intermediate choices and noise. Several issues will be addressed, which include the evolution of cooperation and the evolutionary stability in the presence of noise and more choices. Our experimental study shows that noise has a negative impact on the evolution of cooperation, but could improve, surprisingly, the evolutionary stability.