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In Reply to: RE: It would not matter if you just said above and below 36". Voting Dem. or Rep. is also a dichotomous variable. posted by Norm on June 26, 2009 at 13:05:20
Could you explain one more thing? I am aware that one can find correlation without proving causation. Seems like this issue is irrelevant to ABX testing.
Let's say in an ABX test I have a slight tendency to pick A. Because X is totally random in each trial, there is no way this can influence the results. That's my understanding.
easier to hear and better.
I must say that personally I am okay in just putting cables in and hearing a difference that I like. When I am studying whether people vote their party loyalty or whether states with concealed handgun laws have less crime, I am engaged in science and must be concern with causation, explanation, and whether the data are valid for the questions I am asking. When I am deciding whether one set of cables are better than another, I am not engaged in science. I am assessing my tastes in sound. The magnitude of the improve become important. Often I try blind tests if the improvement is small, but often if it is small I just stick with what I have.
Depending on how you conduct your testing, how thorough and rigorous you are, - your hypothesis and conclusions may vary. And some may call your testing methodolgy "poor science," - but it's still science. I have take issue with the neither those that that want more rigor or less; but, - I always appreciate tolerance for both sides.
Both sides of the river, there is bacteria; there must be meaning behind the moaning, is this living?
minded. When engage in information gathering to assess regularities of some benefit to society, I insisted on valid measurement of concepts, random samples, careful methodology, and care to avoid spurious relationships, when you cannot do real experiments. How I would love to randomly pick 25 states to have concealed handgun laws and 25 none and wait 20 years to see what differences there are between the states. My null hypothesis would, of course, be no differences.
I think it helps a lot that I am the whole population and that even if I'm wrong, there is little downside.
It seems to hit the fan each time someone posts that they did thus and so with good results. To someone else that may seem the depths of impossibility so they ridicule the poster rather than either trying it or just deciding that it's so unlikely that they aren't going to waste the time to check it out. Ridiculing others rather than thoughtfully examining your own understanding is very tempting and I've fallen off the wagon a few times myself.
I enjoyed this thread but like you, I believe, it's hard for me to see how statistics have much value for an individual listener. If I can't hear it, it doesn't matter and if I can I'll try to choose the best compromise if it isn't clear-cut. And I may share the result. Even if it isn't reliably predictive it does provide insights into things to try. And that's where AA shines, getting ideas to play with.
If I want to learn more about the underlying processes then I'd turn to measurements and try to find ones that correlate to the listening and from there try to reproduce the results with known changes which would hopefully be enough information to understand and usefully model whatever the process is.
Ironically even if it can be proven beyond question that Joe reliably hears a difference by putting marbles under his clock radio, that chunk of data alone adds little more to predicting my results than just his assertion that he does. One of the nicest things about this hobby is that you can try this stuff at home without the neighbors knowing.
Rick
a
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