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Arthur R. Jensen on Reaction Range - Dictionary of Arguments

Slater I 124
Reaction range/genetic theories/psychology/Jensen: the genetic concept of “reaction range,” [indicates] the observation that the same genotype can give rise to rather different observable traits in different environments.
Jensen (1969(1) discussed this problem on pages 63-64. Another problem is, that different genotypes may show different reaction ranges: some may be more buffered than others from environmental circumstances.
[Jensen] noted that this implies that heritability estimates may vary for subgroups within population groups, specifically pointing out that no estimates of the heritability of intelligence were available to African-American groups, and that samples that included European-Americans of the same lower SES (socioeconomic status) level as many African-Americans were not sufficiently relevant, as the SES measure might not reflect racial differences in the environmental conditions that actually impact development of intelligence and/or academic performance. >Intelligence tests/Jensen, >Heritability/Jensen.


1. Jensen, A. R. (1969). How much can we boost IQ and scholastic achievement? Harvard Educational Review, 3, 1–123.


Wendy Johnson: „How Much Can We Boost IQ? Updated Look at Jensen’s (1969) Question and Answer“, in: Alan M. Slater & Paul C. Quinn (eds.) 2012. Developmental Psychology. Revisiting the Classic Studies. London: Sage Publications


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Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution. Translations: Dictionary of Arguments
The note [Author1]Vs[Author2] or [Author]Vs[term] is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition.
Jensen, Arthur R.
Slater I
Alan M. Slater
Paul C. Quinn
Developmental Psychology. Revisiting the Classic Studies London 2012


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