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Anyone have Jan 1987 Stereo Review "Do All Amplifiers.."
Anyone have Jan 1987 Stereo Review "Do All Amplifiers.."
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Old 22nd March 2008, 07:14 PM   #11
Jakob2 is offline Jakob2  Germany
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@ Janneman,

as SY pointed out- it could be significant.
Probability to get right answers by chance in these sort of tests is p=0.5 .
If a listener is right on every trial he reaches a probability of p=1 .

So, normally in the analysis we are looking for p>0.5, but if somebody is wrong on every sample he reaches a probability of p=0, and it maybe that he hears a difference in every trial but is unable to give the right answer.
Results like the one you´ve described should in every case get a further examination.

An interesting reading on this topic are Les Leventhals articles in the JAES. He creates the term `Statistical significant poor performance´ for these results.

But unfortunately his articles are a bit hard to read for the stastics challenged.
But i think well written so definetely worth a try.

Wishes
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Old 15th March 2012, 12:55 PM   #12
keyser is offline keyser  Netherlands
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Bruce Coppola's site is down. Does anybody have the article?
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Old 15th March 2012, 03:52 PM   #13
gk7 is offline gk7
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I´ve found it here:
http://webpages.charter.net/fryguy/Amp_Sound.pdf
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Old 16th March 2012, 09:37 AM   #14
keyser is offline keyser  Netherlands
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Thanks!
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