The curve representing Larger/Longer (“More” in the graph) is closest to the y-axis, corresponding to its frequent endorsement in Table 1 and its low difficulty parameters in Table 2, indicating that it is endorsed at lower levels of alcohol problem severity. The slope of the “More” curve for the DUI category is steepest, reflecting its higher discrimination parameter in Table 2. “Time Spent” is farthest from the y-axis, corresponding to its infrequent endorsement in Table 1 and its high difficulty parameters in Table 2, indicating that a high level of severity is needed before it is more likely to be endorsed. The slope of the curve is greater for women than for men, reflecting its greater discrimination among women. A similar gender pattern was observed for Physical/Psychological problems (“Phys/Emot” to the left of “Time Spent”). Sandwiched between “More” and “Phys/Emot” are Social/Interpersonal problems (“Social” in graph) and Inability/Persistent desire to quit (“Quit” in graph). Slopes for the DUI group (dotted lines) were steeper for both these criteria, showing greater discrimination among individuals with than among those without DUIs. The intersection
