Figure 2b.

Descending limb performance on Trails B of the Trail Making Test (Russell et al., 1970) and perceived impairment in older and younger adults. Data are shown as effect sizes (difference between alcohol and placebo [in standard deviations]) with 95% confidence intervals. Data not shown here (but discussed in text) revealed that, although differences in task performance in alcohol and placebo groups were not significant in older adults, older adults receiving alcohol reported more perceived impairment than placebo. These differences in self-reported and performance measures between alcohol and placebo groups were not found in younger adults.