Delusion represents particular social groups through its portrayal of gender and disability. It focuses on the relationship between Summer, who has schizophrenia, and the nurse that exists only in her mind. This represents Summer's disability and shows how someone of the same gender can influence her. Lighting is used to express Summer's feelings and state of mind. The film represents females as weak or the source of fear, while the only male character committed suicide, unable to save Summer from her own mind. While some stereotypes are used, like needing to be saved, others are subverted by having the "bad guy" be female rather than male.