Final answer:
Harriet's writings most clearly reflect the personal fable, a cognitive distortion commonly seen in adolescence.
Step-by-step explanation:
Harriet's writings most clearly reflect the personal fable.
In her novel, Harriet describes her experiences in a way that portrays herself as unique and special, believing that no one has ever thought such deep thoughts or experienced such ecstasy before. This reflects the personal fable, which is a cognitive distortion commonly seen in adolescence where individuals believe that their experiences and feelings are completely unique and that no one else can understand them.