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Table 1 Descriptive statistics (means, standard deviations) for aggressive and prosocial behaviour of boys and girls at each wave of measurement by each informant

From: The developmental relation between aggressive behaviour and prosocial behaviour: A 5-year longitudinal study

   Boys Girls     
Informant Variable (age) M SD M SD min max p d
Teacher Prosocial (7) 1.939 .836 2.412 .737 0 4.00 <.001 0.59
  Prosocial (8) 2.033 .792 2.516 .777 0 4.00 <.001 0.62
  Prosocial (9) 2.130 .835 2.673 .739 0 4.00 <.001 0.68
  Prosocial (11) 1.956 .748 2.451 .750 0 4.00 <.001 0.65
Parent Prosocial (7) 2.478 .543 2.670 .490 0.60 4.00 <.001 0.37
  Prosocial (8) 2.598 .538 2.780 .498 1.00 4.00 <.001 0.35
  Prosocial (9) 2.563 .528 2.774 .512 0.50 4.00 <.001 0.40
  Prosocial (11) 2.587 .555 2.831 .529 0.80 4.00 <.001 0.42
Child Prosocial (7) .796 .185 .841 .156 0 1.00 <.001 0.28
  Prosocial (8) .864 .163 .908 .120 0 1.00 <.001 0.31
  Prosocial (9) .887 .157 .935 .108 0 1.00 <.001 0.35
  Prosocial (11) .860 .166 .928 .095 0 1.00 <.001 0.50
Teacher Aggressive (7) .721 .764 .448 .555 0 4.00 <.001 0.40
  Aggressive (8) .645 .682 .457 .571 0 3.45 <.001 0.30
  Aggressive (9) .678 .686 .452 .560 0 3.55 <.001 0.36
  Aggressive (11) .678 .774 .384 .535 0 3.75 <.001 0.44
Parent Aggressive (7) .669 .445 .539 .381 0 2.75 <.001 0.33
  Aggressive (8) .721 .457 .605 .415 0 2.58 <.001 0.27
  Aggressive (9) .701 .436 .595 .415 0 2.50 <.001 0.27
  Aggressive (11) .562 .380 .453 .340 0 2.41 <.001 0.30
Child Aggressive (7) .187 .176 .157 .170 0 1.00 .002 0.18
  Aggressive (8) .164 .179 .115 .140 0 0.92 <.001 0.30
  Aggressive (9) .152 .176 .100 .131 0 0.92 <.001 0.33
  Aggressive (11) .245 .212 .163 .164 0 0.92 <.001 0.43
Teacher Peer difficulties (7) 1.758 .707 1.710 .715 1 5.00 ns  
  Peer difficulties (8) 1.646 .665 1.633 .651 1 4.67 ns  
  Peer difficulties (9) 1.737 .769 1.684 .708 1 5.00 ns  
  Peer difficulties (11) 1.830 .820 1.778 .777 1 5.00 ns  
  1. Note: d – Cohen’s d estimate of effect size.