Series of papers on New Look at Error and the Patient Safety Movement in Health Care:
Future of Patient Safety pdf What is error? pdf Bridging Gaps pdf

Also see: The Pexis e-course on error, Behind the label 'Human Error', and the "The Tale of Two Stories" entries at this site.

For additional results see:
VA Gaps Center web site
Emily Patterson web site
News item on bar coding studies
Universityof Chicago Cognitive technologies Lab site
Cook news item