No it doesn't, it is grammatically correct as is.
Answer
Neuroscientists focus on the brain and its impact on behavior and cognitive (thinking, reasoning and remembering) functions. Neuroscientists also study the nervous system.
uh, foreshadowing sets up tension and stuff.
Answer:
The sentence should be rewritten as: She has written a novel.
The sentence you provided is grammatically incorrect, because the word <em>has </em>is placed before the word <em>written. </em>If you say it out loud, it doesn't really sound right either. All you have to do is switch them around.
Hope this helps!