Table 3.

Sex-specific estimates of handedness heritability in three studies on UK university students. (Hull University (studies 1 and 2) and Open University (study 3). Left-handedness criterion: writing hand (studies 1 and 3) left hand preference for any one out of the 12 items (study 2). Data from Annett (1973, 1978).)

parent	father						mother
sex of offspring	male			female			male			female
study	1	2	3	1	2	3	1	2	3	1	2	3
h2 (%)	17.4	16.8	—	3.5	31.9	—	56.6	42.3	79.2	51.1	58.3	46.5