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Your tests are meaningless....

>>All the tests I've participated in did not require training

I find this to be analagous to saying that drug trials do not require a control group. Training involves many things, one of them is testing the listener for the ability to discern known JNDs. If, for example, a listener can not realibly hear known, scientifically proven differences about say 10Khz, then using that individual to test for suspected differences in that area would be pointless.

>>The whole purpose of rapid switching is to create that "proper stimulus"

No, the purpose of rapid switching is to avoid short term memory issues and has nothing to do with the stimulus. The test tone or material would be the stimulus and must be designed to test where suspected differences lie. Again, if that is above 10Khz as an example, then playing tones in the 1Khz area or bass instruments would be pointless.

What you're describing is surely fine as a casual test to help you determine gross differences, but I wouldn't call it scientific or in line with accepted methodologies.

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