significant differences from those twins who did not participate. Twins who participated in the original 1981 Australian twin study who could be located also were included in the 1992 diagnostic interview followup survey. Similar to the research conducted by Schuckit, even when drinking history and alcohol problems reported at the time of the original challenge study were controlled for, people with histories of alcohol dependence at interview followup had significantly lower scores on the alcohol reactivity measure at baseline.
