Overcoming the Perception Problem

There is little point to any listening test, blind or sighted, where the listener is pre-disposed to ignore any audible differences.

The onus is on those who say/believe that they hear an audible difference to demonstrate it in a double-blind test. Those who say there is no audible difference have no reason to take the test.

(Though, occasionally, people who don't think they hear an audible difference will take the test for the heck of it, or to satisfy their own curiosity, and in doing so sometimes prove to themselves and others that there is a barely audible difference).

Cheers,
David.