Aberdeen Birth Cohort 1936
The Scottish Mental Surveys were conducted as a school test of mental ability on the entire Scottish population aged 11 in 1932 and 1947. Follow-up of cohort members has been conducted from two centres, Aberdeen and Edinburgh. The Lothian (Edinburgh based) cohort, consisting of 550 men and women born in 1921, took part in clinic assessments at ages 79 (N = 500) and 83 (N = 320), and are currently undergoing a third assessment (N approx. 220). The Aberdeen cohort consists of approximately 350 men and women born in 1936 and followed up in 2000-01 at age 64.