Table 4.

Descriptive Information for Conditions Included in Mean Effect Size Comparisons (N = 35)

Content component	Nwith	M(d)with	Range(d)with	Nwithout	M(d)without	Range(d)without	Diff
Drinking profile	34	.40	−.61–1.27	1	.26	NA	+.14
Norms	34	.40	−.61–1.27	1	.26	NA	+.14
Didactic info	26	.42	−.61–1.27	9	.32	.13–.51	+.10
Risk factors	24	.45	−.61–1.27	11	.28	.08–.51	+.16
BAC	21	.40	−.61–1.27	14	.39	.11–1.24	+.01
Practical costs	20	.50	.06–1.27	15	.26	−.61–.88	+.24*
Resources	14	.45	.06–1.27	21	.36	−.61–1.24	+.09
Strategies	10	.66	.11–1.27	25	.29	−.61–.88	+.37**
Consequences	14	.33	−.61–1.24	21	.44	.06–1.27	−.11
Decisional balance	5	.70	.14–1.27	30	.35	−.61–1.24	+.35*
Expectancies	3	.53	.24–1.09	32	.38	−.61–1.27	+.10

Note. Mean effect sizes for written feedback conditions that collected follow-up data within 6 months of baseline (N = 33). Difference values represent the difference in mean effect size between studies that included the component versus those that did not. BAC = blood alcohol concentration.

^*p <.05.

^**p <.01.