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Type: Posts; User: badchad

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    If you want something to get you started, Amazon...

    If you want something to get you started, Amazon has these "Pronto Tec Axius Series" tablets. They're bottom-of-the barrel cheap (about $50). You probably get what you pay for, and some complain...
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    The problem I experienced when moving to LED was...

    The problem I experienced when moving to LED was a lack of head-to-head comparison.

    None of the stores I went to (even the local mom and pop home theater store) had comparably calibrated sets to...
  3. Thread: Flying Dog

    by badchad
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    If you're in the MD region definitely take a tour...

    If you're in the MD region definitely take a tour of the facility. It's pretty awesome and the tasting isn't wimpy IMO.
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    That was a good read.

    That was a good read.
  5. Thread: Huh ?

    by badchad
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    I thought a separate article provides some...

    I thought a separate article provides some backstory for why the father was charged.

    He tells the 8 year old kid to walk home and the kid goes missing. Yup, he couldn't find his son. Apparently...
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    I'm not a statistician, so I'll keep my comments...

    I'm not a statistician, so I'll keep my comments broad. However, I would encourage you to work out the trials beforehand.

    For example, in a straight A/B discrimination (where the odds of guessing...
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    I may have missed it, but is there a third party...

    I may have missed it, but is there a third party to verify cables are hooked/unhooked?
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    For the record, I think blind tests should be...

    For the record, I think blind tests should be used in all sorts of things (even TVs). Heck, someone published a study this week that under blinded conditions, it turns out that people who...
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    I wouldn't say the test was "invalid". Nor would...

    I wouldn't say the test was "invalid". Nor would I assume that the visual observation of the singers biased the trained listeners report/observations. I would merely suggest that bias from viewing...
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    Sure. I guess the point of my (hypothetical)...

    Sure. I guess the point of my (hypothetical) modifications would have been a double-blind evaluation of a musical device. With some minor tweaks, we could have designed a study to assess much...
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    Glad we agree on something. I'm...

    Glad we agree on something.




    I'm curious, which of the suggestions was unfeasible or unsound and why?
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    I referenced the articles as examples of the use...

    I referenced the articles as examples of the use of double-blind testing in evaluating audio equipment (i.e., violins). I note that both, peer-reviewed articles appear in PNAS. PNAS is a respected...
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    I hate when that happens, as I have to drink...

    I hate when that happens, as I have to drink everything blindfolded.

    Even the greats sometimes fail when blinded.

    http://www.livescience.com/44651-new-violins-beat-stradivarius.html

    I don't...
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    So this is primarily what I'm interested in. ...

    So this is primarily what I'm interested in. I'll try and withhold further comment until I read the paper.



    To be clear, this is what I had intended (manufacturer testing).

    To expand...
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    The evaluators aren't. The cable is. Using...

    The evaluators aren't. The cable is.

    Using the scenario/setup for evaluation outlined in your JOSS paper, why MUST the evaluators know the identity of the equipment they are evaluating? (the...
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    lol. A simpler question would be; "Why must...

    lol.

    A simpler question would be; "Why must you know the identity/brand of a cable, in order to properly evaluate it?". Couldn't you evaluate a cable without knowing what it is? (blinded).
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    You can study perception in and of itself,...

    You can study perception in and of itself, without it having anything to do with economics or buying habits. This is basic science. For example, you could study how an instructional set affects...
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    Studying human behavior and perception is a very...

    Studying human behavior and perception is a very different thing than studying consumer and buying habits. Often, in the study of economics the end goal is increasing sales. This is not the case in...
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    Let me be clear: I don't disagree that you can...

    Let me be clear: I don't disagree that you can reduce bias. You can reduce bias.

    My point is that in an experimental (non-consumer) setting, blinding is perhaps easier, and more efficient. How...
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    Absolutely. Certainly agree you can train...

    Absolutely.



    Certainly agree you can train individuals to listen for particular aspects of sound quality. I struggle with how that eliminates bias in the case of a cable comparison. In an...
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    We can agree to disagree here. I think we all...

    We can agree to disagree here. I think we all have inherent bias, whether we're aware of it or not. These biases are formed from the moment we're born due to our life experiences. This is Psych....
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    I would provide the rather boring answer of...

    I would provide the rather boring answer of "simple curiosity." But that is merely my personal opinion. I think human perception is a fascinating thing.

    One could also make the "snake oil"...
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    The purpose of the blind is to eliminate...

    The purpose of the blind is to eliminate pre-existing bias. We all have these inherent biases, many of which we are unaware of. These biases are not always synonymous with education/training/etc.
    ...
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    Yes. However, this is because I'm a...

    Yes. However, this is because I'm a pharmacologist by trade. My profession involves designing and evaluating the studies used to assess the effectiveness of drugs. Since I focus on the subjective...
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    Double-blind testing is an experimental...

    Double-blind testing is an experimental design/method. There is no compelling reason why it can only be used in "experienced" or "unexperienced" participants, regardless of the subject matter. Your...
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