Domain Mean Standard deviation Distribution of ranks N Mean ranks Sum of ranks Z Sig
Self-directed aggression Pre 19.83 5.57 Negative 12 6.50 78.00 -3.06 *0.002
Post 12.92 1.31 Positive 0 .00 .00
Ties 0 - -
Aggression directed at others Pre 60.25 9.71 Negative 11 6.00 66.00 -2.93 *0.003
Post 48.33 8.90 Positive 0 .00 .00
Ties 1 - -
Aggression directed at property Pre 19.92 2.96 Negative 12 6.50 78.00 -3.07 *0.002
Post 13.08 1.88 Positive 0 .00 .00
Ties 0 - -
Total Pre 100.00 17.32 Negative 12 6.50 78.00 -3.06 *0.002
Post 74.33 10.89 Positive 0 .00 .00
Ties 0 - -