3 KudoZ points awarded for this answer. Comment: "Many thanks to you both, Harry and Tony. I went with the generic "correction characteristics" for a couple of reasons. I do think in this case it had more to do with sample bias than non-responses; they had on the order of a 100% response rate, but their sample selection was biased (an elite, private, religious school in a 3rd-world country). So it wasn't so much a problem of some people not responding as that everyone they reached was male and upper-class. In retrospective I guess Redressment means just that, redresser = redress = correct. "