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Positive Action logo
Positive Action logo
Positive Action logo
Positive Action logo
Evidence Based. Internationally Recognized.
Short URL
Outcome
Improvement
Effect Size
p - value
Publication
Study
Date
Frequency of Disruptive Behaviors - Student Reports
-19%
-0.50
- -
2013
Normative Beliefs in Support of Aggression - Student Report
-25%
-0.68
- -
2013
Violent Behaviors
75%
- -
< 0.001
2013
Violence - Related Behaviors
36%
- -
- -
2011
Carried Knife or Razor to Hurt Someone
63%
0.64
- -
2009
Threatened to Cut or Stab Someone
62%
0.62
- -
2009
Cut or Stabbed Someone
71%
0.77
- -
2009
Carried a Gun
56%
0.57
- -
2009
Shot at Someone
75%
0.89
- -
2009
Gets Into a Lot of Fights - Teacher Report of Student Behavior
29%
0.30
- -
2009
Physically Hurts Others - Teacher Report of Student Behavior
33%
0.31
- -
2009
Threatens Others - Teacher Report of Student Behavior
29%
0.27
- -
2009
Violent Behaviors
51%
- -
0.001
2009
Violent Behaviors -Teacher Reported
34%
- -
0.035
2009
Destroys Things Belonging to Others - Teacher Report of Student Behavior
40%
0.41
- -
2009
Violent Behavior - Matched Sets
68%
0.965
0.000
2003
High School Violence - Low Feeder
31%
0.70
0.000
2003
High School Violence - High Feeder
50%
0.70
0.000
2003
Middle School Violence - Low Feeder
36%
0.66
0.047
2003
Middle School Violence - High Feeder
70%
0.65
0.047
2003
Violence
26%
1.26
- -
Prior to 2001
2002
Violence - Student to Student
87%
- -
0.048
2001
Violence - Student to Staff
100%
- -
0.022
2001
Violent Incidents - per school
86%
- -
0.028
2001
Violent Incidents - per 1000 students
85%
- -
0.013
2001