Table 1.

Subject Characteristics and Task Performance.

	FH−	FH+ Control	FH+ Problem

N	20	20	21
Males: Females	11:9	12:8	12:9
Age (years)	19.2 (1.9)	19.0 (1.6)	19.3 (1.3)
IQ (WISC-III)^a	112 (9)	109 (13)	110 (10)
Alcohol Abuse or Dependence	0	0	6
Mj Abuse or Dependence	0	0	5
Other Drug Abuse or Dependence	0	0	2
Any Substance Use Disorder Dx^b	0	0	8
Conduct Disorder Dx	0	0	4
Attention Deficit Disorder Dx	0	0	1
Any Dx^c	0	0	8
# Alcohol Problems from DDHx	0.9 (1.4)	1.6 (1.7)	11.4 (4.8) ^*
Drinking Volume^d from DDHx	19.0(43.5)	26.7(59.4)	55.2(77.8)^*
Mj Use – past 12 months from DDHx	1.1(2.4)	.8(1.8)	3.3(2.8) ^*
# Illicit drugs ever used from DDHx	.45(.83)	.55(.89)	2.67(2.4) ^*
Mother/Father/Both Dependence	0/0/0	2/9/7	3/10/7
Mother/Father/Both Abuse	0/0/0	2/4/0	1/1/0
Mother/Father/Both Dependence or Abuse	0/0/0	0/9/11	3/10/8
Mother/Father/Both Abused other Drugs	0/3/0	1/6/2	2/11/3
Youth Self Report (YSR) Form – T scores
Total Internalizing	44(12.8)	43(12.1)	49(7.8)
Total Externalizing	46(8.7)	49(12.6)	57(9.7) ^*
Go-no-go task performance
RTs (msecs)	420 (55)	404 (52)	430 (44)
False alarm rate	.24 (.19)	.25 (.13)	.20 (.10)
Total error rate	.26 (.21)	.27 (.14)	.22 (.12)

Dx, diagnosis; Mj, marijuana; msecs, milliseconds; DDHx, drinking and drug history form.

Wechsler Intelligence Scale for Children – 3^rd edition. These data were collected when participants were between the ages of 12 and 14 years as part of the ongoing Michigan Longitudinal Study.

Includes alcohol abuse or dependence, marijuana abuse or dependence and/or other drug abuse or dependence

Includes conduct disorder, attention deficit disorder and/or any substance use disorder.

drinking days over past year X usual # of drinks per day.

Significant differences between groups (described fully in text).