Table 4. Means (standard deviations) and ranges, overall one-way ANOVAs, pair-wise comparisons (Tukey HSD), and effect sizes for drinking behavior of the three groups.

	Non Drinker M (SD)	Light Drinker M (SD)	Heavy Drinker M (SD)	Non Drinker-Light Drinker	Non Drinker-Heavy Drinker	Light Drinker-Heavy Drinker	η2
On how many days did you have a drink of alcohol in the past 30 days?	0.00 (0.00) 0-0	4.57 (3.91) 0-15	5.27 (4.89) 0-20	4.50**	5.27**	0.77	0.23
One how many days did you engage in heavy drinking (4 or more drinks for females and 5 or more drinks for males) in the last 30 days?	0.00 (0.00) 0-0	3.04 (3.00) 0-12	5.77 (5.12) 0-20	3.04*	5.77**	2.73*	0.27
Number of blackouts experienced in the last 30 days (1=never; 2=1-2 times; 3=3-4 times; 4=5 or more times)	1.00 (0.00) 1-1	1.72 (0.87) 1-4	2.25 (1.00) 1-4	0.78**b	1.26**	0.48*	0.29
What is the largest number of drinks containing alcohol that you have consumed in a 24-hour period at any time in your life? [1 drink= one 12-oz. beer, one 5-oz. glass of wine, one 12-oz. wine cooler, or 1 oz. of liquor.	0.00 (0.00) 0-0	5.68 (5.02) 0-20	8.00 (6.29) 0-20	5.56**	8.00**	2.43+	0.27

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