Table 5.

Means and SE of Physical Aggression Directed by Stranger toward Resident.

Stranger 5-HTT × Resident 5-HTT
sex	Stranger: l/l, Resident: l/l	Stranger: l/l, Resident: s-allele	Stranger: s-allele, Resident: l/l	Stranger: s-allele, Resident: s-allele
Females	0.18 ± 0.30	0.00 ± 0.43	0.15 ± 0.40	0.23 ± 0.70
Males	0.18 ± 0.36	0.39 ± 0.57	0.36 ± 0.55	6.45 ± 0.76