In my experience, I'm nervous about a test I will do well. However if I am confident I lull myself into a false sense of security and then do poorly !!
Also, pulling all nighters is a bad idea for studying. It is during REM sleep that your body consolidates information which you have learned during the day. Without sleeping it will be very hard to recall information.
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"A casual stroll through the lunatic asylum shows us that faith proves nothing." - Friedrich Nietzsche
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