The Scarr-Rowe interaction refers to heritability of IQ: very high at the upper end of the socioeconomic scale, very low at the lower end. You can see it in this paper, in Figure 3, for "A" (additive genetic variance) versus shared and unshared environment:
<http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.397.9014&rep=rep1&type=pdf> The usual interpretation is that people at the upper end of SES have the pleasure of being able to *express* their genetic differences in IQ, while those at the bottom do not. Seems like a natural fit for a study of the "heritability" of educational achievement. --David ----- Original Message ----- From: "Teaching in the Psychological Sciences (TIPS)" <[email protected]> To: "Teaching in the Psychological Sciences (TIPS)" <[email protected]> Cc: Sent: Wed, 25 Jul 2018 19:43:27 -0400 Subject: Re: [tips] The Genetic Theory of Educational Achievement Is about 90% Horse Manure! Hi David: Please explain what a Scarr-Rowe interaction is and why it may be a rookie mistake not to take it into account. Your link summary/abstract does not clarify the issue. I fear that this discussion may be headed into a descending spiral where the label n@zi will be used. Best regards to all. Ken --------------------------------------------------------------------------------------------- Kenneth M. Steele, Ph.D. [email protected] [1] Professor Department of Psychology http://www.psych.appstate.edu [2] Appalachian State University Boone, NC 28608 USA --------------------------------------------------------------------------------------------- On Jul 25, 2018, at 7:21 PM, David <[email protected] [3]> wrote: More troublingly, I'm not seeing any indication that they investigators accounted for a Scarr-Rowe interaction. Rookie mistake. That interaction should've been the *first* thing they looked for. Otherwise, as Eric Turkheimer has argued, they might be better off not estimating "heritability" at all <http://psycnet.apa.org/record/2011-18633-009 [4]>. --David Epstein [email protected] [5] ----- Original Message ----- From: "Teaching in the Psychological Sciences (TIPS)" <[email protected] [6]> To: "Teaching in the Psychological Sciences (TIPS)" <[email protected] [7]> Sent: Wed, 25 Jul 2018 15:29:27 -0400 Subject: Re: [tips] The Genetic Theory of Educational Achievement Is about 90% Horse Manure! Household income is incredibly highly skewed. Assuming they obliviously used a linear coefficient to obtain the 7% figure, it is probably a severe under-estimate of the true size of the effect. Chris ….. Christopher D Green Department of Psychology York University Toronto, ON M3J 1P3 Canada 43.773897°, -79.503667° [email protected] [8] http://www.yorku.ca/christo [9] ………………………………... On Jul 25, 2018, at 1:58 PM, Michael Palij <[email protected] [10]> wrote: At least for White Europeans. A masive study using genomic info as a predictor of educational achievement showed that genes accounted for only about 11% of the difference in years of education. The Scientist Mag has a layperson friendly description of the study published in the journal "Nature Genetics". See: https://www.the-scientist.com/news-opinion/genes-explain-about-11-percent-of-differences-in-years-of-education-64552 [11] There are links in the article to additional sources. So, I guess this pretty much undermines "g" or single factor theories of intelligence (assuming intelligence drives educational achievement as certain theorists assert). In addition, household income accounts for only 7% of the variance in the differences which some might consider a unexpected low amount. I guess this all goes to show that your genetic ancestry (sorry Galton) nor wealth/poverty are the most important factors in academic acheivemnt, like getting a Ph.D. or other advanced degree. Now, I just hope the results are replicable. ;-) -Mike Palij New York University [email protected] [12] P.S. To Miguel: don't worry about the tipos. ;-) --- You are currently subscribed to tips as: [email protected] [13]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13524.94845a3ed9806f1cef14973830dd8c39&n=T&l=tips&o=52578 [14] (It may be necessary to cut and paste the above URL if the line is broken) or send a blank email to leave-52578-13524.94845a3ed9806f1cef14973830dd8...@fsulist.frostburg.edu [15] --- You are currently subscribed to tips as: [email protected] [16]. 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