Mediating factors are the psychological and social conditions in the communication process that moderate the effects of persuasive mass communication.The concept was first introduced by Joseph T. Klapper in his influential book The effects of mass communication (1960) .ediating factors are the psychological and social conditions in the communication process that moderate the effects of persuasive mass communication. The concept was first introduced by Joseph T. Klapper in his influential book The effects of mass communication (1960) .