It’s sort of funny, after having posted the previous item this morning, to come across some analysis of the ‘National IQ test’ last night. If you have a look through there you can see some good examples of using graphs to exaggerate differences, by simply changing the y axis scale.
And that’s aside from the debates about the futility of assigning a single number to ‘intelligence’. The psychometric literature has a lot to say about this. And that’s aside from all of the issues about socioeconmic effects biasing the outcomes.
I guess what really pisses me off is the general trend to give people a quick summary of information, without indicating to them that it is a summary. So people get these sound bites of, for example, ‘HRT increases the risk of breast cancer’, without an explanation of how much, for whom, who these numbers were obtained by, how they were obtained, or even that there may be more to the story than that.
It’s this sort of crap that led to the Asteroid Flap of a week or so ago. If you looked at the actual findings, it was pretty clear that there was a pretty wide area the asteroid was going to pass through, and because of the limited accuracy of observations, the earth happened to intersect that area, creating the possibility of an impact in 2019. Of course, it was reported as ‘End of the world to come via asteroid in 2019′. And that’s it. No wonder people panicked.
Again, it would be nice for people to simply ask ‘Where is this information from? How reliable is it?’ before getting too excited about stuff they see in the news.