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Comment As a scuba instructor... (Score 1) 285

... it gets dark pretty quick down there. Even at 100ft/30m you've lost a lot of the color spectrum. So they'll take a lot of lights with them. Okay, fine. Don't expect any sweeping vistas -- the background's going to be black.

What are they going to film for Avatar 2 that they can't film a few thousand feet shallower? Neat rock outcroppings? The only thing I can think of are bizarre critters, which will be done in CGI anyway.

I'm all for exploring the depths, but whoever said the Avatar 2 angle is a tax write-off was dead on.

Comment 79% is not fantastic (Score 5, Informative) 68

I've collaborated on research using Twitter traffic as a predictor so I applaud their efforts, but a 79% correlation with telephone responses is not as high as it sounds. For example, the minimum acceptable correlation for interrater reliability is typically 80%.

Put simply, the Twitter data can only account for about two thirds of the variation in phone responses. That's useful but there's still a lot of unexplained variance -- we have a long way to go.

Comment Re:Yes, by all means, let's stamp out... (Score 1) 158

You are entirely correct. Social scientists don't need names or addresses (IP or physical). We can figure out who you are with a frighteningly small number of data points. Doubly so for individuals who have a public Facebook profile and therefore probably have public profiles elsewhere on the net. I suspect that this guy, despite his best intentions, did NOT anonymize the data well enough to hide at least 80% of the users.

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I'd rather just believe that it's done by little elves running around.

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