Themis;373827 Wrote: > > When certain variables just can't be verified, you have to eliminate > them one after another. For instance, in this coffee problem, I would > start with measuring the audience's ability of choosing a coffee. Just > like Pat did with his magic switch : serve the same coffee and > eliminate all audience which finds a difference. Or (if you don't want > to eliminate them) at least you have to take into account that -for > instance- 30% of them give inconsistent answers. So, we have now one > more variable fixed. Because the assumptions of 0%, 50% or 100% of > consistency or inconsistency they are all wrong. maxrob200;373680 Wrote: > Being an avid coffee drinker, let me throw in the following variables. > 1. Are the temperatures of the boiler the same? > 2. Are the shots pulled after temperatures have stabilised or pulled > between heatup of the water in the boiler > 3. External variable - The consistency of the grinder. Different > grinders will grind different tasting shots. The type of blades and the > speed of the grinding will affect quality of the grind and prevent > burning of the coffee beans > 4. External variable - The age and freshness of the beans as well as > the humidity of the room will affect the grinding and taste. > These objections would apply at least as much (very likely much more, but at least as much) to an uncontrolled sighted taste test. In other words the coffee lovers' claims, that the Caffefile 200 is better, are invalidated at least as much by these issues as the blind test results.
A person will only draw a conclusion when they feel satisfied the variables have been addressed - otherwise they won't draw a conclusion at all. Whether they know which machine made the cup, or whether they don't, doesn't change the consideration of variables. Darren -- darrenyeats SB3 / Inguz -> Krell KAV-300i (pre bypass) -> PMC AB-1 Dell laptop -> JVC UX-C30 mini system ------------------------------------------------------------------------ darrenyeats's Profile: http://forums.slimdevices.com/member.php?userid=10799 View this thread: http://forums.slimdevices.com/showthread.php?t=56712 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
