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Sources:
The effects of low doses of caffeine on human performance and mood:
http://www.springerlink.com/content/v5523347762rw558/
Effects of Acute Psychosocial Stress on Working Memory Related Brain Activity in Men:
http://journals1.scholarsportal.info.ezproxy.library.yorku.ca/tmp/11027014133817505061.pdf
Learning to react like a god:
http://books.google.ca/books?id=ZgdkVhHUjEMC&pg=PA48&lpg=PA48&dq=sound+enhance+spatial+sense&source=bl&ots=jZzfJuGcHi&sig=Mi_mzIkHCoIsaK7wEBxcf9SJCnM&hl=en&ei=c2K8TPa_HIyhnQfV5LXjDQ&sa=X&oi=book_result&ct=result&resnum=2&sqi=2&ved=0CBcQ6AEwAQ#v=onepage&q=sound%20enhance%20spatial%20sense&f=false
Increased display size and resolution improve task performance in Information-Rich Virtual Environments:
http://lcweb.senecac.on.ca:2134/10.1145/1150000/1143102/p139-ni.pdf?key1=1143102&key2=3235147821&coll=ACM&dl=ACM&CFID=106265532&CFTOKEN=34658173
= Research Notes =