You should be able to find what you need here.
http://scholar.google.com/scholar?q=optimism+psychology&hl=en&btnG=Search&as_sdt=1%2C23&as_sdtp=on
HELP going through home CRISIS
Find a peer reviewed article which discusses the effects of optimism on physical and psychological health. (You may need to find two articles in order to cover both the physical and the psychological areas).
2 answers
Here is one article:
http://www.members.cox.net/dagershaw/lol/Optimism.html
http://www.members.cox.net/dagershaw/lol/Optimism.html