ISSN:
1573-3297
Keywords:
parent-offspring correlations
;
regressions
;
measured intelligence
;
sex differences
;
sibling correlations
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Psychology
Notes:
Abstract Studies of family resemblances for measured intelligence show a substantial heritability for this conglomeration of characteristics. We have 2029 pairs of parents with one or more offspring. The IQ values for both parents were obtained when they were in their “teens,” and their offspring were likewise tested during their teens. The regression coefficient for each offspring's IQ on the midparental average IQ, for the 2029 pairs, was 0.613±0.022. The regression for the offspring when the midparental average IQ was above 114 (+1σ), with 259 pairs, was 0.496±0.139. The regression for the offspring when the midparental IQ averages were from 74 to 114 was 0.481±0.034 (−2σ to +1σ), with 1664 pairs. The regression when the midparental IQ average was below 74, with 106 pairs, was 1.531 ±0.324. Statistical truncations, such as the above, can cause gross aberrations in the correlations and regressions of the subsamples. The effects of such truncations on the relevant literature are discussed. The average correlation between siblings was 0.387 with 95% confidence intervals of 0.318–0.451.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01073784
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