As I am out today with back pain, I thought it would be appropriate to research psychology and its role in chronic pain. I found a few of these interesting articles:

http://bja.oxfordjournals.org/cgi/content/full/87/1/144 

http://www.ncbi.nlm.nih.gov/pubmed/2147702?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DiscoveryPanel.Pubmed_Discovery_RA&linkpos=3&log$=relatedarticles&logdbfrom=pubmed