Table 2. Means, Standard Deviations, and t-Values for Males and Females.

	Mean (SD)
Variable (range)	Overall	Males	Females	t
RWDD (0to 25)	1.94 (3.64)	1.88 (3.43)	1.99 (3.82)	−0.30
Intention (−3 to+3)	−1.11 (0.82)	−0.96 (0.86)	−1.24 (0.76)	3.71***
Willingness (−3 to +3)	−1.08 (0.83)	−0.94 (0.87)	−1.20 (0.77)	3.37***
Pos. expectancies (−2 to 2)	−0.25 (1.00)	−0.13 (0.99)	−0.37 (0.99)	2.70**
Neg. attitudes (−20 to 20)	12.82 (7.05)	10.83 (7.63)	14.76 (5.81)	−6.52***
Parental descriptive norms (0 to 50)	7.22 (10.86)	6.72 (10.38)	7.81 (11.36)	−1.13
Peer descriptive norms (0 to 50)	10.84 (12.21)	10.84 (12.41)	10.77 (11.82)	0.07
Parental injunctive norms (−2 to +2)	−1.77 (0.55)	−1.73 (0.58)	−1.80 (0.53)	1.46
Peer injunctive norms (−2 to +2)	−1.27 (0.74)	−1.18 (0.72)	−1.35 (0.75)	2.65**

RWDD, riding with drinking drivers.

^**p < 0.01,

^***p < 0.001.