[Scott[_6_]]

On Monday, September 30, 2013 6:05:25 AM UTC-7, KH wrote:
On 9/29/2013 7:40 PM, Audio_Empire wrote:

In article , KH

wrote:



On 9/27/2013 4:04 PM, Audio_Empire wrote:


And DBT is unreliable because the bias controls are only effective for a

positive result, not for a null result. So, what does one do?





Really?

It certainly *can* be and often is. depends on the test protocols.

What makes you think this? Bias controls are applicable and

effective no matter what the test result.

Do tell me what is controlling for a *same sound bias* in an ABX DBT in which the subjects are aware of the what A and B actually are? That is one of the most common ABX DBTs I have seen reported by the typical week end warrior objectivist.

You assume that there must be

a positive result to verify the efficacy of the controls, but that

simply isn't the case.

There must be some sort of evidence that the test is capable of showing differences where differences actually do exist otherwise you don't know that the test was in some way masking real differences.


And once again, *all* that is required is to

test subjects that, in open evaluations, hear differences that *should*

(based on physics and engineering principles) not be there. If they are

detectable in bias controlled tests, they are audible. If not, then

it's clear that bias is involved.


Again it depends on the test. A badly designed or badly executed DBT does not bring any sort of clarity to the picture.