Table 2.
Longitudinal Bayesian social network analyses on friendship selection, maintenance and influence related to prosocial and aggressive behavior in all classrooms (N = 81 classrooms)
| Random | Fixed | Class-level variation | ||||||
|---|---|---|---|---|---|---|---|---|
| Network dynamics | μ | sd (μ) | p | η | sd (η) | p | τ2 | sd (τ2) |
| Friendship cohesion (density) | −0.91 | 0.17 | <0.01 | 1.84 | 0.39 | |||
| Reciprocity in friendship | 1.61 | 0.07 | >0.99 | 0.30 | 0.05 | |||
| Transitive group formation (gwespFF) | 1.64 | 0.06 | >0.99 | 0.32 | 0.05 | |||
| Transitive group formation (gwespBB) | 0.23 | 0.06 | >0.99 | 0.26 | 0.04 | |||
| Indegree popularity (sqrt) | −0.55 | 0.06 | <0.01 | 0.22 | 0.04 | |||
| Outdegree popularity (sqrt) | −0.63 | 0.05 | <0.01 | 0.21 | 0.03 | |||
| Outdegree activity (sqrt) | 0.00 | 0.04 | 0.50 | 0.17 | 0.02 | |||
| Effect of gender on nominations received* | 0.07 | 0.05 | 0.91 | 0.27 | 0.04 | |||
| Effect of gender on nominations given* | −0.06 | 0.07 | 0.20 | 0.32 | 0.05 | |||
| Same gender friendships | 0.55 | 0.05 | >0.99 | 0.31 | 0.05 | |||
| Effect of prosocial behavior on nominations received | 0.37 | 0.02 | >0.99 | |||||
| Squared effect of prosocial behavior on nominations received | −0.11 | 0.02 | <0.01 | |||||
| Effect of prosocial behavior on nominations given | −0.46 | 0.04 | <0.01 | |||||
| Squared effect of prosocial behavior on nominations given | 0.09 | 0.04 | >0.99 | |||||
| Selection based on similarity in prosocial behavior | 0.12 | 0.03 | >0.99 | |||||
| Maintenance based on similarity in prosocial behavior | 0.15 | 0.04 | >0.99 | |||||
| Effect of aggression on friendship nominations received | −0.02 | 0.01 | 0.09 | |||||
| Squared effect of aggression on friendship nominations received | −0.03 | 0.02 | 0.05 | |||||
| Effect of aggression of friendship nominations given | −0.04 | 0.02 | 0.02 | |||||
| Squared effect of aggression of friendship nominations given | −0.02 | 0.02 | 0.21 | |||||
| Selection based on similarity in aggression | 0.06 | 0.02 | >0.99 | |||||
| Maintenance based on similarity in aggression | 0.27 | 0.03 | >0.99 | |||||
| Prosocial ego * aggressive alter: prosocial adolescents select aggressive friends | 0.06 | 0.02 | >0.99 | |||||
| Aggressive ego * prosocial alter: aggressive adolescents select prosocial friends | 0.02 | 0.02 | 0.82 | |||||
| Behavior dynamics | ||||||||
| Prosocial behavior: linear shape | –2.39 | 0.17 | <0.01 | 1.27 | 0.19 | |||
| Prosocial behavior: quadratic shape | −0.48 | 0.05 | <0.01 | 0.26 | 0.04 | |||
| Prosocial behavior: indegree | 0.35 | 0.02 | >0.99 | |||||
| Prosocial behavior: outdegree | 0.08 | 0.01 | >0.99 | |||||
| Prosocial behavior: effect from gender | −0.94 | 0.11 | <0.01 | 0.68 | 0.13 | |||
| Prosocial behavior: effect from aggression | −0.08 | 0.04 | 0.02 | |||||
| Influence prosocial friends on prosocial behavior adolescent | 0.26 | 0.08 | >0.99 | |||||
| Influence aggressive friends on prosocial behavior adolescent (evaluation) | −0.32 | 0.17 | 0.01 | |||||
| Influence aggressive friends on prosocial behavior adolescent (endowment) | 0.12 | 0.30 | 0.63 | |||||
| Aggressive behavior: linear shape | −0.07 | 0.15 | 0.31 | 0.68 | 0.12 | |||
| Aggressive behavior: quadratic shape | 0.03 | 0.05 | 0.72 | 0.35 | 0.04 | |||
| Aggressive behavior: indegree | 0.00 | 0.02 | 0.51 | |||||
| Aggressive behavior: outdegree | −0.01 | 0.01 | 0.31 | |||||
| Aggressive behavior: effect from gender | 0.33 | 0.10 | >0.99 | 0.52 | 0.10 | |||
| Aggressive behavior: effect from prosocial behavior | −0.04 | 0.06 | 0.27 | |||||
| Influence aggressive friends on adolescent’ aggression | 0.47 | 0.07 | >0.99 | |||||
| Influence prosocial friends on aggression adolescent (evaluation) | 0.32 | 0.15 | 0.99 | |||||
| Influence prosocial friends on aggression adolescent (endowment) | −0.06 | 0.30 | 0.42 | |||||
Posterior means η and standard deviations sd (η) for fixed parameters. Posterior means μ and sd (μ) for random parameters. The p represents the percentile of zero in the posterior distribution. Asterisk indicates girls are reference category