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Table 3 Linear Mixed Models Linking Intervention Conditions to Disruptive and Prosocial Behaviors in Post-intervention

From: Examining the impact of a social skills training program on preschoolers’ social behaviors: a cluster-randomized controlled trial in child care centers

  Intervention Intervention & Covariates
β SE Df p-value ICC β SE Df p-value ICC
Disruptive Behavior
Unconditional model
Random intercept
   Intercept 3.19 0.2 17.55 <  0.01 0.09      
Conditional Models
Covariate & intervention variables
   Intercept 2.94 0.27 17.43 <  0.01 0.08 2.99 0.29 18.52 <  0.01 0.05
   Intervention 0.52 0.39 16.31 0.19   0.39 0.40 18.27 0.34  
   Familial SES       0.27 0.42 98.93 0.52  
Moderation models
Children’s sex
   Intercept       2.52 0.34 39.80 <  0.01 0.03
   Intervention       0.98 0.46 36.72 0.04  
   Familial SES       0.29 0.40 156.87 0.02  
   Children’s sex       0.93 0.41 118.14 0.46  
   Children’s sex * Intervention       −1.19 0.57 113.14 0.04  
Familial SES
   Intercept       3.01 0.30 17.86 <  0.01 0.05
   Intervention       0.35 0.43 17.47 0.41  
   Familial SES       0.17 0.67 146.49 0.80  
   Familial SES * Intervention       0.17 0.86 110.96 0.84  
Prososcial Behavior
Unconditional model
Random intercept
   Intercept 7.08 0.16 14.95 <  0.01 0.08      
Conditional Models
Covariate & intervention variables
   Intercept 7.31 0.22 14.52 <  0.01 0.07 7.28 0.23 17.76 <  0.01 0.03
   Intervention −0.47 0.31 13.44 0.16   −0.46 0.31 17.45 0.16  
   Familial SES       −0.04 0.35 109.28 0.92  
Moderation models
Children’s sex
   Intercept       4.22 0.46 167.29 <  0.01 <  0.01
   Children’s pre-intervention level of prosocial behaviours       0.46 0.06 144.98 <  0.01  
   Intervention       −0.17 0.37 251.65 0.65  
   Familial SES       0.09 0.3 20.02 0.77  
   Children’s sex       0.31 0.32 251.81 0.34  
   Children’s sex * Intervention       −0.24 0.42 251.25 0.57  
Familial SES
   Intercept       7.34 0.23 18.19 <  0.01 0.03
   Intervention       −0.48 0.34 17.72 0.17  
   Familial SES       −0.06 0.45 110.91 0.89  
   Familial SES * Intervention       −0.07 0.61 94.10 0.91  
  1. Note. SES Socio-Economic Status, B Regression Coefficient, SE Standard Error, Df Degree of Freedom, ICC Intra-Class Correlation