wadia-miester,

Thanks for replying. However, I am not sure what you are trying to test in that listening session you have just described. Are you testing to see how consistent is the panel of 10 people in identifying potential audible differences?

I was thinking more like if you believe cables has a better direction when applied for audio application due to the molecular structure or whatever then ask your panel to decide which is the prefered direction comparing

A. the way your initial research lead you to believe it should be or

B. the alternative reverse.

X. a random selection of A or B

Now if you ask your 10 people under DBT what is X and consistently 7 to 9 people consistently identify X correctly and it happens to be A then yeap I will believe cables has a direction. If the listening test is done by engineers without DBT and they declare A is better it is not solid prove, since it is human to believe in your own research.   

If you or any other manufacturer has done this then I will consider the possibility that cables do have a direction. Note I do not care what the old science textbooks says. It is very simple.

Edit

Surely a person like you with a science degree could understand this basic procedure? What constitute a scientific listening test in your R&D department? I am asking because I dont think we could tear up our science textbooks before subjecting this with DBT.