Conventions of a Psychological thriller

• Often include investigations, e.g a murder where the protagonist is the detective trying to find the murderer.
• They often lead the viewer off in the wrong direction, or make it really difficult for the viewer to guess who the murderer is and then the plot will end with a twist.
• The antagonist in a psychological thriller often has some sort of mental illness, e.g schizophrenia.
• The protagonist quite often has personal problems, e.g a death to someone close to them, making them quite odd themselves.
• characters mentality questioned 
• Plot may be confusing for the audience
• Theme based on memories or dreams.
• Danger on mental level
• Sense of mystery in films.