This study examined family antisocial characteristics according to whether
biological fathers Eve at home and agree to be study participants. Antisoci
al symptoms were tabulated for 161 clinic-referred children and their paren
ts. Families with fathers at home had fewer paternal, maternal, and child a
ntisocial symptoms, and scored higher on multiple SES indicators, than did
families with departed fathers. Antisocial characteristics were highest, an
d SES was lowest, when fathers could not be located or recruited. Results s
uggest that requiring father participation (as in family-trio genetic desig
ns) screens out the more antisocial families. Of clinical interest, antisoc
ial behavior in any family member is more likely if the father is absent an
d nonparticipating. The heightened antisocial behavior in children associat
ed with absent biological fathers was not mitigated by presence of stepfath
ers and was not accounted for by lower SES. The ethical use of mother repor
t on absent fathers is discussed.