Handedness, dyslexia and twinning in homosexual men.
A study of handedness, dyslexia, stuttering and twinning, was included in a study of sexual habits of homosexual men. A questionnaire was mailed to homosexuals, and 394 forms suitable for data analysis were received. The results showed an increased rate of lefthand writing (17.5% compared to 8-8.4%), and a clear left shift. There were increased occurrence of both stuttering (7.1% compared to 1.6%) and reading difficulties (7.9% compared to 1-3%). The incidence of twins was lower than the population (1.3%). The results confirm earlier attempts to show a left shift in homosexuals, and support Geschwind's hypotheses about etiological factors for both lefthandedness and homosexuality.
Götestam
K O
KO
University of Trondheim, Department of Psychiatry and Behavioural Medicine, Ostmarka Hospital, Norway.
Coates
T J
TJ
Ekstrand
M
M
D000328:Adult; D004410:Dyslexia / Q000453:epidemiology / Q000523:psychology*; D007839:Functional Laterality / Q000502:physiology*; D006716:Homosexuality / Q000523:psychology* / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008875:Middle Aged; D013342:Stuttering / Q000523:psychology; D011795:Surveys and Questionnaires; D014427:Twins / Q000523:psychology* / Q000706:statistics & numerical data