Table 1.

Descriptive Characteristics of the 60 participants in the Study Sample. Data are expressed as mean SD or frequency (%).

Variable	All participants (n=60)	Primary Startle Participants (n=40)	Non-startle Participants (n=20)
Age	22.47 (1.87)	22.73 (2.01)	21.95 (1.47)
Sex (% Female)	50	50	50
% White	57	50	70
% Black	12	15	5
% Asian	20	22.5	15
% Hispanic	5	2.5	10
Number of Drinking Occasions in the past 30 days	10.43 (5.44)	9.93 (4.92)	11.45 (6.38)
Number of Drinks per Occasion	4.07 (1.94)	3.82 (1.84)	4.55 (2.09)

Of the 60 participants, all engaged in alcohol-administration procedures and were involved in the “group” startle condition, and 40 (50% MALE, average age=22.7) served as primary startle participants (see above for description of startle procedures).