Quote Originally Posted by okiemax
Yes, I think you are right about how such tests are conducted, but what I am curious about is what were the participants told going into the test.
They were certainly not told to not listen for differences

Of course they are told as in any such DBT, which one is different? Except the presentration in reality is the same. So, if th elistener doesn't hear differences, that is the answer to put. Why would anyone hear differences between the same component presented twice? Human nature looks for differences, even if there is none, many will still claim one. Human psychology.