Detecting cheating in written exams
A paper in the BMJ in May looked at using statistical analysis of the similarity of answers as a tool for detecting cheating in exams. The setting was exams set by the Royal College of Paediatrics and Child Health and the study did identify a small number of candidates with very similar answers.
Two letters were published in the 25th June issue of the BMJ, and there have been a lot of rapid responses. Scroll down to the end of the original paper to see all these, and links to the published letters.