In the RCT, the average effect across knowledge, attitudes, and values outcomes was substantively important (0.35) but not statistically significant, with several individual outcomes null¶

Claim · All claims
Evidence · 1 study · causal r? · q3
Currency · newest study 2006 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? The average effect size across all knowledge, attitudes, and values outcomes in the RCT was 0.35, substantively important by WWC criteria but not statistically significant. → What Works Clearinghouse 2006 q3 i? In the RCT, positive attitudes toward nonviolence, assertiveness, goal setting, and intentions for marijuana and fighting were not statistically significant. → What Works Clearinghouse 2006

Evidence¶

What Works Clearinghouse 2006¶

What Works Clearinghouse, U.S. Department of Education. (2006). WWC Intervention Report: Too Good for Drugs and Violence. https://www.mendezfoundation.org

q3 · i? · causal · r?

WWC aggregation of all Bacon (2001a) outcomes in the randomized controlled trial. Appendix A3 prints the study average as "0.35 ns +14"; individual outcomes including nonviolence attitudes (0.33) and assertiveness (0.29) were marked ns.

"The average effect size across all outcomes in this study in the knowledge, attitudes, and values domain was large enough to be considered substantively important using WWC criteria, although it was not statistically significant."

Discussion¶

Related Claims¶

• Three of seven knowledge, attitudes, and values outcomes favor Facing History and Ourselves, including relationship maturity (best response) with effect size 0.45, but none remain statistically significant after WWC corrections — related
• Lessons in Character shows no discernible effects on knowledge, attitudes, and values — related
• The WWC rated Too Good for Drugs and Violence as having positive effects on knowledge, attitudes, and values, with a cross-study domain-average effect size of 0.42 — related
• Too Good for Violence shows a substantively important but not statistically significant effect on students' knowledge, attitudes, and values — related
• Too Good for Drugs shows no discernible effects on student knowledge, attitudes, and values across two randomized controlled trials — related
• Effects on behavioral intentions for marijuana use and fighting were not statistically significant in either study — related
• Lessons in Character shows no discernible effects on student behavior — related
• Facing History and Ourselves shows no discernible effects on student behavior, with self-reported fighting differences neither statistically significant nor substantively important — related
• Four of seven knowledge, attitudes, and values outcomes favor the comparison group, including ethnic identity (effect size -0.19) and both moral reasoning measures, none statistically significant — related
• One item-level attitude finding, on teachers helping students who need extra help, was statistically significant in the randomized trial — related