In ~1980, Professor Martin conducted a
study on 206 pairs of twins looking at the effects of an alcohol challenge.
The study involved a general questionnaire, an Eysenck Personality
Questionnaire (EPQ) and an alcohol challenge. The subjects were trained on
apparatus as part of a battery of psychomotor tests. They were then given a
measured dose of alcohol proportional to body mass and the psychomotor tests
were readministered 3 times at hourly intervals.
Of the original 206 pair, 82 pair returned
for a repeat experiment (36 male pairs and 46 female pairs) as part of the
study protocol. The 206 pair were then targeted as part of the Canberra study but not all participated. Sydney is a follow up on the 206 Alcohol
Challenge pairs conducted as a gradual process 10-12 years later. The SSAGA study sample also includes all Sydney pairs.
In 1997, all AC twins and their families
were re-contacted and asked for a blood sample. Approximately 750 subjects
supplied a blood smaple or a buccal swab.
The 1980 general questionnaire contained
- Personal details
- Zygosity of twins
The psychomotor battery included tests on:
- Motor coordination (Vienna Determination
- Body sway
- Pursuit rotor
- Arithmetic computation
- Simple and complex reaction times
- Physiological measures
- Intoxication self-ratings and
- Blood alcohol measurements