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RE: To be entirely clear the Retraction I mention should come from you.

>Again the relevant quote from Atkinson's source:

"The authors have demonstrated the two-tone experiment described above to
numerous people on different systems. No one has ever failed to hear the
timbral change with phase, and discern the polarity reversal on this
signal with unvarying accuracy. Indeed, in a double-blind demonstration
to eleven members of the SMWTMS audio group [13], the accuracy score was
100% on the summed 200-Hz and 400-Hz tones over loudspeakers, and
overall, including musical excerpts, the results on the audibility of the
polarity inversion of both loudspeaker channels were 84 correct responses
out of 137, this representing confidence of more than 99% in the thesis
that acoustic polarity reversal is audible."

Thank you for researching the original, bjh.

>So while Atkinson wrote "on music to a 99% confidence limit" when to be
>entirely correct he might have written "on music and special signals to
>a 99% confidence limit" to say what he wrote was totally false is
>manifest hyperbole.

Quite. It also appears to be based on people confusing the actual score
in the testing with the statistical confidence limit in that score, as
both you and I have now pointed out.

John Atkinson,
Editor, Stereophile


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