Table 2.

Sample and sample change statistics for friendships, antipathies, and homophobic attitudes

	School 1 (n = 756)				School 2 (n = 1011)				School 3 (n = 167)
	Friendship		Antipathy		Friendship		Antipathy		Friendship		Antipathy
Sample	Wave 1	Wave 2	Wave 1	Wave 2	Wave 1	Wave 2	Wave 1	Wave 2	Wave 1	Wave 2	Wave 1	Wave 2
Network density indicators	0.008	0.008	0.003	0.003	0.007	0.007	0.003	0.003	0.032	0.030	0.018	0.014
Average degree	6.963	6.599	2.465	2.227	6.566	6.624	2.555	2.953	5.342	5.015	2.906	2.348
Missing fraction	0.115	0.142	0.115	0.142	0.106	0.280	0.106	0.280	0.108	0.192	0.108	0.192
Other network indicators
Reciprocity (edgewise)	0.410	0.408	0.098	0.058	0.479	0.483	0.100	0.112	0.455	0.470	0.162	0.145
Transitivity	0.259	0.277	0.080	0.078	0.332	0.327	0.076	0.113	0.368	0.369	0.185	0.149
Sample change	Wave 1–Wave 2		Wave 1–Wave 2		Wave 1–Wave 2		Wave 1–Wave 2		Wave 1–Wave 2		Wave 1–Wave 2
Network changes
Jaccard index (stability)	0.36		0.15		0.42		0.18		0.42		0.21
No. of ties dissolved	2026		1125		1717		1157		265		257
No. of ties emerged	1799		965		1831		1457		257		186
No. of ties maintained	2146		365		2612		564		381		116
Changes in homophobic attitude
No. of steps down	232				194				50
No. of steps up	281				305				66
Actors that remain stable	229				285				47

Reciprocity was calculated as 2M/(2M + A), where M = mutual ties and A = asymmetric ties. Transitivity was calculated as N of transitive triplets divided by N of 2-paths (potentially transitive triplets). For more information on the calculation of the different network indices see Veenstra and Steglich (2012)