Psychological thriller is a specific sub-genre of the wide-ranging thriller genre. However, this genre often incorporates elements from the mystery genre in addition to the typical traits of the thriller genre.
Generally, thrillers focus on plot over fictional characters, and thus emphasize intense, physical action over the character's psyche. Psychological thrillers tend to reverse this formula to a certain degree, emphasizing the characters just as much, if not more so, than the plot.
The suspense created by psychological thrillers often comes from two or more characters preying upon one another's minds, either by playing deceptive games with the other or by merely trying to demolish the other's mental state.
Sometimes the suspense comes from within one solitary character where characters must resolve conflicts with their own minds. Usually, this conflict is an effort to understand something that has happened to them.
