Table 4.

Social network measures using HWI ¹ for littermate pens with or without victimized pigs in the pen.

Item	Littermate Pens		SE	p-Value
	With Victimized Pigs	Without Victimized Pigs
# of pens	3	3
Pigs/pen	8	8
At 6 weeks of age
Density 2	0.125	0.113	0.013	0.56
Distribution of ties 3
Absent ties	19.7	20.0	2.56	0.93
Weak ties	6.3	6.0	1.45	0.88
Strong ties	2.0	2.0	0.82	1.00
At 8 weeks of age
Density	0.131	0.139	0.016	0.74
Distribution of ties
Absent ties	19.3	17.3	2.54	0.60
Weak ties	6.0	8.3	1.41	0.35
Strong ties	2.7	2.3	0.94	0.81

¹ HWI stands for half-weight association index. ² Density = sum of HWI/28. ³ The number of each type (absent, weak, or strong) of ties. The number of possible ties was 28 for each pen of 8 pigs.