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So what's going on? The blog of the Association for Scholarly Publishing seems to be in PLoS One bashing mode these days. This time with a post about the new Impact Factor (IF) for PLoS One. There has already been quite some discussion going on away from the original post (as nobody with scientific credentials seems to be inclined to post comments there anymore). The two people reading my blog (hi Mom!

So how can a journal that allows 7 out of 10 manuscripts through their gate achieve such a stellar rating?
Asking this question can entail a few things:- The author doesn't know how left-skewed data affect the arithmetic mean (see any statistics textbook).
- The author doesn't know how the IF is 'calculated' (see links above).
- The author doesn't know that there is little/no correlation between pre-publication selection and IF (BMJ 1997).
- The author does know all this, but thinks his readers don't know any of the above.
A small hint for those who actually read below the fold: IFs correlate with the number of papers published. This is no surprise as the chances of getting a high-citation paper increase with the number of papers and not with any suposed 'selectivity'. Given the skewedness of citation data, citations (the numerator) accumulate faster than the number of papers in a single journal (the denominator) and hence the correlation. PLoS One is on its way to become the largest journal of the world and hence, over the long run, it's IF would increase, if the IFs weren't deprecated before then.
The whole question is just so inane! The IFs are so entirely bogus and useless that the question in the TSK post is like asking for the scientific basis of intelligent falling or if Adam had a navel.
The whole question is just so inane! The IFs are so entirely bogus and useless that the question in the TSK post is like asking for the scientific basis of intelligent falling or if Adam had a navel.
Posted on Tuesday 22 June 2010 - 14:50:22 comment: 0
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