“…One study (Bates et al, 2005) found a clinically significant, moderate effect size for change in memory in a large sample of alcoholics retested 6 weeks after entering treatment, whereas another (Mann et al, 1999) found no evidence for treatment-related improvements in memory tests after a comparable interval in a sample of 49 alcoholic men even though improvement occurred in other functional domains. Cross-sectional studies have shown that alcoholics sober for several months (Sullivan et al, 2000d;Sullivan et al, 2002;Meyerhoff, 2005;Rosenbloom et al, 2005), one year (Hochla et al, 1982;Parsons et al, 1990;Munro et al, 2000;Rosenbloom et al, 2004), or as long as seven years (Brandt et al, 1983) may still show memory deficits relative to non-alcoholic controls. However, other crosssectional studies have shown that performance on memory tests is related to length of abstinence (Joyce and Robbins, 1993;Oscar-Berman et al, 2004), and that alcoholics sober for more than 4 years are undistinguishable from controls on memory testing (Grant et al, 1984;Reed et al, 1992;Oscar-Berman et al, 2004;Fein et al, 2006).…”