(Im really sorry for hi-jacking this thread)
Shnurek,
Ive been noticing your posts on a variety of issues for a couple of months now. I generally enjoy reading your insights and think youre a great contributor. However, Ive noticed that this idea (RE: medical students are too old in this country because their fluid intelligence is past its prime, and this is the root of a lot of problems) is something of a pet interest for you. You seem to bring it up a lot. And as much as I respect your other contributions Im finally going to call you out on this. I think you are over-reaching and extrapolating data way too much.
First off, your primary source in in this post is highiqpro.com. Looking into that website it appears to be a site that sells an IQ-improvement regimen. Not that a biased information source alone is enough reason to discount the information they present (because some of it is true), but the fact that its coming from a commercial, totally non-peer-reviewed source adds a bit of skepticism right off the bat.
Yes, it is true that average fluid intelligence (Gf) decreases gradually after full adulthood is reached. Yes, it is true that Gf can be improved with mental exercise and practice. The end. Thats really the extent of the data right there. Anything beyond that is extrapolation.
So here are a few reasons Im pulling the BS-flag on the med school/residency should start at a younger age idea:
1 - There have been no studies, that Im aware of, that look at Gf in medical students and residents explicitly. Youve got to separate them from the general populace. Most average people are done with formal education by their mid-20s and your average job doesnt require an excessive amount of Gf use, but rather relies on the execution of memorized protocols. Thus, perhaps the peak age of Gf is significantly higher for med students or others (like yourself) who are pursuing advanced education.
2 - According to the graph you posted from that commercial website, giving it the benefit-of-the-doubt and assuming it to be accurate for a moment, the peak doesnt really seem to drop off significantly until the average persons mid-30s. This leads me to suspect that, even if everything else youre saying is right, the effects of having slightly older medical students/residents are far less exaggerated than youre making them out to be.
3 - The science that you are basing your assumptions on actually weakens your argument. If Gf tends to decrease with age, and if Gf can be improved with training, than isnt it possible that the rigorous critical thinking involved in medical education could actually increase Gf? Or at least cancel-out the deleterious effects of aging?
4 - This, to me, the most important thing
even if you are totally correct in all your assumptions, is having a marginally higher Gf at the time of medical training really worth the potential trade-offs in maturity, emotional and social competency, and overall well-roundedness that a slightly (were talking 2-3 years here
) older and more seasoned medical student/resident brings to the table?
5 - There is a huge, glaring gap between where the science ends and where you propose that medical education occurs at a suboptimal age. There is an even HUGER and 1000 times wider gap between that presumption and the notion that midlevel providers (or ODs, since you brought it up) are able to match physicians' level of expertise because, even though they trained for less time, they got more bang for their buck because they were a few years younger. I mean really?? Is that really the argument you wanted to make? Because thats what your concluding paragraph suggests.
For those interested, here are the nuts and bolts of the actual evidence on these matters:
(Jaeggi, Buschkuehl, Jonides, & Perrig, 2008)
(Feiyue, Qinqin, Liying, & Lifang, 2009)
(Tranter & Koutstaal, 2008)
Feiyue, Q., Qinqin, W., Liying, Z., & Lifang, L. (2009).Study on Improving Fluid Intelligence through Cognitive Training System Based on Gabor Stimulus. Paper presented at the 1st International Conference on Information Science and Engineering (ICISE).
Jaeggi, S. M., Buschkuehl, M., Jonides, J., & Perrig, W.J. (2008). Improving fluid intelligence with training on working memory. [Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.]. Proc Natl Acad Sci U S A, 105(19), 6829-6833.doi: 10.1073/pnas.0801268105
Tranter, L. J., & Koutstaal, W. (2008). Age and flexible thinking: an experimental demonstration of the beneficial effects of increased cognitively stimulating activity on fluid intelligence in healthy older adults.[Randomized Controlled Trial Research Support, Non-U.S. Gov't]. Neuropsychol Dev Cogn BAging Neuropsychol Cogn, 15(2), 184-207. doi: 10.1080/13825580701322163