A summary score of each participant’s weekly alcohol consumption was calculated from the DRQ. All participants satisfied the pre-determined definition of a heavy or light drinker. Heavy drinkers consumed an average of 58.6 units (SD: 26.5) per week; light drinkers consumed 3.58 units (SD: 2.1). No light drinker totally abstained from alcohol.
Mean word recall of the four groups of participants to the two categories of interference task are shown in figure 1. It appears that heavy drinkers in the alcohol interference condition recalled fewer words in comparison with heavy drinkers in the neutral interference condition. There is to be no particular difference in word recall between light drinkers in both conditions. Overall, heavy drinkers in the alcohol interference condition appear to recall fewer words than any other group.
Fig. 1. Mean word recall on the memory task of heavy and light drinkers to the two interference tasks. Heavy/Alc, heavy drinkers exposed to alcohol-related pictures; Heavy/Neut, heavy drinkers exposed to neutral pictures; Light/Alc, light drinkers exposed to alcohol-related pictures; Light/Neut, light drinkers exposed to neutral pictures.