Correlation analyses indicated consistent and strong negative relationships between MD in the ILF (MJ+ALC < Control) and performance on measures of complex attention (CVLT-II List A Trial 1, Digit Span total scaled score, Digit Span backward) and verbal retention (Logical Memory II delayed recall) for users only. In contrast, MD in the occipital-lingual region (MJ+ALC > Control) was positively associated with performance on measures of complex attention (Digit Span total scaled score, Digits Backward, PASAT 2-second trial) in controls only (see Table 2). Hierarchical regression analyses of MD did not reveal significant findings.
