The study of drinking and cognitive impairment has been very popular. Over the past 15 years much work has been conducted examining the specific characteristics of alcohol-related impairment, concurrent morphological changes and the process itself. Numerous theories have been advanced and progress has been made in a number of areas. However, at the present time the area is undergoing a period of re-evaluation. it is clear that if there is an association between alcohol consumption and cognitive impairment, there are a multitude of 'other factors' which need to be controlled for, before one can maintain that observed impairment is indeed a result of alcohol consumed.