Questions
Tom McCreadie wrote:
Dave Plowman wrote:
Thing with all these tests is you can usually get the result you are
looking for - if in charge of the tests.
But the whole point - well, half the point :-) - of a properly-conducted double
blind test is that the researcher himself is _not_ in charge of the tests; he's
not allowed to be aware of the identity pf the choices that he's presenting to
the "patients", so he's not in a position to influence the results.
You can still influence the results a lot by adjusting the time between
the samples are presented, subject selection, equipment placement, and
choice of material. ESPECIALLY choice of material.
Edison did blind demonstrations at which members of the general public
could not tell the difference between a live singer and cylinder playback.
Today's unsophisticated audiences are more sophisticated than that, but
it's a lot easier to do with a singer than a harpsichord.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
|