I am associated with a teaching hospital, and medical students are frequently administered tests and measures to monitor their progress. I am not talking about exam results here, but of psychological measures that do not figure on their transcripts. For "ethical" reasons, researchers typically need to annonymize the results. To be specific, I currently have "burnout" measures from a class of first year students. I also have "burnout" measures from a class of third year students ... the same individuals, two years later. I want to compare the results, but I don't have student ID's. A matched pairs analysis would be nice, but I don't have the matching variable.
The two samples (year 1 and year 3) are dependent, since they involve the same individuals. A two-sample t-test seems dodgy in this case. I imagine that a permutation test might work, but I'm not sure which one to use. Any ideas?