I have done research about the thriller genre and its target audience, based on gender and age.
I researched the Imdb website and looked at the demographics for thrillers.

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http://www.imdb.com/

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These are the statistics for the thriller 'Looper', which is an action thriller. It is evident here that the target audience for this subgenre is mainly male as the highest rating from the film came from a male audience which totalled in 18979 votes.