Postmodernism is often associated with radical changes to the standard expectations of a specific genre, this means that a postmodern text can use ideas and themes not commonly seen in that genre, they often change or contrast modern beliefs. Postmodern texts often consist of one of the following ideas:
Hyper-Reality- The idea that the actual world and the world we see in media texts are becoming increasingly blurred.
Intertextuality- When a media text contains references to other media texts within it.
Simulation- The idea that what is unreal is vastly becoming more important than actual reality.
Bricolage- Mixing together different ideas in order to give something a completely new meaning.
Pastiche- This is a respectful imitation of a film genre which is often closely linked to parodies but much more respectful to the media text imitated.
The sources I used to help me were:
http://english.berkeley.edu/Postwar/postmodernism.html
http://www.tc.umn.edu/~rbeach/teachingmedia/module4/8.htm
http://www.oxforddictionaries.com/definition/english/hyperreal
James Shelton A2 Media Studies 