Does BIAS affect audio test results?

[Speedskater]

26 minutes ago, pkane2001 said:

Preference testing, aka, qualitative testing: testing to see which DUT the subject prefers, which one sounds better, often ranked on a scale, say one to ten

That's a true meaning of the word 'subjective' ears only test.

* * * * * * * * * * *

The kind of real 'subjective' test that Floyd Toole and Sean Olive often write about.