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Critic's Corner Discuss a review. Provide constructive feedback. Talk to the industry. |
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In Reply to: RE: Nobody In Audio Does True DBT .......... posted by Kal Rubinson on December 3, 2014 at 14:00:30:
"There is no necessity for a separate group to test a placebo in audio as there is in medical/physiological studies."
They do placebo-controlled studies with other endeavors, including automotive testing. The key is the test subject not being aware there is anything being compared to. Once the test subject become aware that a comparison might be taking place, there will be bias. (He might then think he might be evaluating a placebo. This information should not be given to him.)
"In the latter, exposure to the DUT can change the response to the placebo and vice versa. One cannot untake a drug or procedure."
Exactly.
From the perspective of the test subject, he might be sent an audio component for evaluation. He evaluates it, then sends it back, with his impressions. The key is that he has no idea that the item might be a placebo product, and he has no idea that there is such a comparison taking place. (Same goes for the individual who packed and shipped the item.) He just knows he received a product to evaluate, and he evaluates it. He might even become interested in the product if it were to come to market, even if it turns out he evaluated a placebo. (Although if he liked what turned out to be a placebo, he might not like the real product.)
"Also, double-blind tests do not restrict the type of testing. They only require, by definition, that neither the subject nor the tester be aware of the identity of the DUTs until the conclusion of the test."
True.... But once either individual becomes aware that a comparison is taking place, all bets are off.
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Follow Ups
- RE: Nobody In Audio Does True DBT .......... - Todd Krieger 16:04:30 12/03/14 (0)
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