Re:Don't Be Ugly By Accident
by nevinera on Tuesday August 10, 2010 @01:53PM
(#1592361)
>If they own a dSLR, they're more likely to be good at composing photographs.
That's a very valid point, selection bias is the most-missed bias in studies of every stripe. But they're not beginners:
>And we also found similar numbers looking only at people who uploaded all three types of photos.
They didn't show a graph of that data, because this is an article rather than a formal study. Getting similar results in an intersection study is an excellent way to show that selection bias was at least not overwhelming - depending on the sample size, it might not even be significant.
The conclusion they made was pretty well supported, and seems like something you would agree with - the details they give are quick guidelines, but it boils down to "photographic skill matters".
That's a very valid point, selection bias is the most-missed bias in studies of every stripe. But they're not beginners:
>And we also found similar numbers looking only at people who uploaded all three types of photos.
They didn't show a graph of that data, because this is an article rather than a formal study. Getting similar results in an intersection study is an excellent way to show that selection bias was at least not overwhelming - depending on the sample size, it might not even be significant.
The conclusion they made was pretty well supported, and seems like something you would agree with - the details they give are quick guidelines, but it boils down to "photographic skill matters".