What happened to the Flynn Effect?
Have you been following the Flynn effect research? It's dead, Jim.
Speaking of Jim Flynn, he has a new book out: Are We Getting Smarter? Rising IQ in the Twenty-First Century. On page 5 it says this:
Nations with data about IQ trends stand at 31. Scandinavian nations had robust gains but these peaked about 1990 and since then, may have gone into mild decline. Several other nations show persistent gains. Americans are still gaining at their historic rate of 0.30 points per year (WAIS 1995-2006; WISC 1989-2002). British children were a bit below that on Raven's from 1980 to 2008, but their current rate of gain is higher than in the earlier period from 1943 to 1980. German adults were still making vocabulary gains in 2007 at a slightly higher rate than US adults. South Korean children gained at double the US rate between 1989 and 2002 (Emanuelsson, Reuterberg, & Svensson, 1993; Flynn, 2009a, 2009b; Pietschnig, Voracek, & Formann, 2010; Schneider, 2006; Sundet, Barlaug, & Torjussen, 2004; Teasdale & Owen, 1989, 2000; te Nijenhuis, 2011; te Nijenhuis et al., 2008).
The US & UK generate something like 28% of the world's research papers; the US is the biggest source of papers and the UK the third biggest. In between is China, about which Flynn says (p. 64):
China's mean IQ is already at least the equal of developed western nations and her high rate of growth appears unstoppable.
However, his recent data for China only cover 5-6-year-olds, who apparently gained 0.2 points a year between 1984 & 2006 on the WPPSI. All in all, though, it seems like the 3 most dominant countries for science papers (accounting for about 38% of global output between them) still have a Flynn effect.
Also, here's something tangential but nonetheless interesting that I spotted:
(Maybe the PNAS paper comments on this coincidence of timing, I haven't read it yet.)
[Belated edit to fix "gows" typo.]
Without looking at the details: I regard Scandinavian countries as the 'peak' or ceiling for the US, since they have invested heavily in health and education in ways the US haven't and which we can see in other metrics like height and longevity. (The specifics don't matter here, I think, whether the US is being dragged down by minorities or this is intrinsic to wealth inequality or whatever.)
Moving on to the US: his use of averages is interesting, but this doesn't tell me too much - 2006 was a while ago, and mightn't there be falls or plateaus? And on what...
From Gene Expression by Razib Khan who some of you may also know from the old gnxp site or perhaps from his BHTV debate with Eliezer.
Link to original post.