I am Tuya Sa, a PhD student at Loughborough University, conducting research on mathematicians' conception on different dimensions of proofs.
I would like to invite you to participate in a short web experiment. It will take around 10 or 15 minutes (but there is no time limit).
You will be randomly assigned a factor for judging the proofs, which could be any one of 'generality', 'economy', 'seriousness', 'depth', 'inevitability', or 'beauty'.