Visual testing for noise levels -- a challenge

Started 1 month ago | Discussions thread
j_photo Veteran Member • Posts: 3,416
Re: Science ennobles?

JimKasson wrote:

j_photo wrote:

MyReality wrote:

An interesting and valid test. Similar to a double-blind test of a single variable in a print, but zoomed in.

I don't think it's double-blind. Jim was aware of the right answer when he posted the question. It's possible he could have subconsciously telegraphed a preference. In a double-blind test, the poster also wouldn't know.

The order of the presentation was determined by a Matlab random number generator. The mechanism for doing that is in the source code I posted. I posted the files in alphabetical order by file name.

Jim

You are very thorough Jim! I'm not saying your method of presenting the question was flawed. And I admit, it would be very difficult for you to telegraph bias via a forum post.

But for the sake of argument, I don't think this qualifies as a double-blind test. You certainly are biased, in that you have an expectation for what the outcome should be.

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