Dear all I have a bit off topic question. I need to compare some measured values with people's subjective estimation (was not done yet). Before I start the experiment I would like to consult some appropriate literature. Basically I will have several samples and several people can evaluate all samples. They can e.g. rank samples according to some feature orthey can do something else. Can I simply compare the average ranks with measured value? Where to look for some info about planing such experiment and evaluating results? Thanks for any hint. Petr