Three criteria that discriminated at lower levels of alcohol severity, larger/longer, inability/persistent desire to quit, and social/interpersonal problems, showed DCF by DUI status, with higher difficulty parameters in individuals with DUIs than those without. This means that individuals with DUIs were less likely to endorse these criteria, on average, than were individuals without DUIs at the same level of alcohol problem severity. The higher discrimination parameters among individuals with than without DUIs suggests that individuals with DUIs were less likely to endorse these criteria at low levels of alcohol problem severity and more likely to endorse them at higher levels than were individuals with no DUIs. The measurement precision of these criteria was also better in individuals with DUIs, suggesting that they function well in exceptionally high-risk populations. The higher severity threshold required before endorsement by individuals with DUIs may reflect differences in life circumstances, perception, or attitude between the groups. For example, the higher rates of divorce and separation among individuals with DUIs may well be a consequence of excessive alcohol use, however, unless it is perceived as an
