Soundman;688560 Wrote: > We found a simple way to do this: > 1. Two or more people are required to do the test: the operator and the > listener(s) and - of course - two devices (with and without mods). > 2. The operator uses the mute-switch to turn the sound on and off and > the input-selector to choose the device. > 3. The listeners can neither see which device is playing nor what the > op does, to make sure that they never know which device is playing. > 4. Before activatig a device the op mutes the sound, selects a device > with the input-selector and turns the sound back on. The operater may > of course play the same device several times in a row or switch back > and forth. Like that it is not predictable what he does. > 5. The op writes down what he did and the listeners note what they hear > (and keep silent during the test). > 6. Compare the notes to see the results. > 7. Repeat the test with another op if desired... and so on... > > Done like that, the listeners can only rely on what they hear... or > guess :-) Okay, but that is _not_ a double blind test at all, because the operator knows what is being selected. Even if the operator doesn't know which Touch is connected to which amp input, he or she will know whether the sound is ABAB or AAAB. By definition, in a double-blind test neither the listener nor the operator have any knowledge of what is playing. The point of double-blind is to make sure that no communication between the listener and the operator, including subtle non-verbal communication and even unconscious signals, influences the tests.
Don't get me wrong: as I said before, even a single-blind test is a big step forward from most of the discussion/claims around here. And I happen to believe that it's possible to minimize 'contamination' from an operator who is not 'blinded'. But you're wrong to call it a DBT. -- aubuti ------------------------------------------------------------------------ aubuti's Profile: http://forums.slimdevices.com/member.php?userid=2074 View this thread: http://forums.slimdevices.com/showthread.php?t=91322 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
