Consider Jack and Oskar
Michael Rossi: Twin Studies, 7 February 2013
Born Together – Reared Apart: The Landmark Minnesota Twin Study
by Nancy Segal.
Harvard, 410 pp., £39.95, June 2012,978 0 674 05546 9 Show More
by Nancy Segal.
Harvard, 410 pp., £39.95, June 2012,
“... twins, as a means of further clarifying the effects of heritability. In 1937, Horatio Newman, Frank Freeman and Karl Holzinger introduced the idea of using twins raised in different households, in a study of 19 pairs of twins. And three studies by Cyril Burt between 1943 and 1966 put a number on the heritability of IQ (77.1 per cent). In the early decades ... ”