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¶

Claim · All claims
Evidence · 1 study (2 entries) · quant-synthesis r? · q3 · i2 medium
Currency · newest study 2006 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i2 The WWC domain-average effect size across both studies was 0.42, with an average improvement index of +16 percentile points (range +5 to +21). → What Works Clearinghouse 2006 q3 i? The WWC assigned the rating of positive effects because one study's average effect was substantively important and the other's was statistically significant, with no contrary evidence. → What Works Clearinghouse 2006 (2)

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 · i2 · quant-synthesis · r?

WWC aggregation across the two reviewed studies (one RCT, one quasi-experimental) yielded a domain-average effect size of 0.42 ("0.42 na +16"). The report states "The average improvement index for knowledge, attitudes, and values is +16 percentile points, with a range of +5 to +21 percentile points across findings."

"Domain average9 for knowledge, attitudes, and values across studies 0.42 na +16"

What Works Clearinghouse 2006 (2)¶

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

q3 · i? · quant-synthesis · r?

WWC rating rationale: criterion 1 required two or more studies showing statistically significant positive effects, at least one meeting standards with a strong design; criterion 2 required no statistically significant or substantively important negative effects, which the WWC analysis confirmed was met.

"Positive effects: Strong evidence of a positive effect with no overriding contrary evidence."

Discussion¶

Related Claims¶

• Building Decision Skills combined with service learning has potentially positive effects on high school students' knowledge, attitudes, and values — related
• The WWC rates Project CRISS® as having potentially positive effects on comprehension for adolescent learners, with an average improvement index of +20 percentile points — related
• In a quasi-experimental study, Too Good for Drugs and Violence produced statistically significant effects on attitudes toward violence, emotional competence, social and resistance skills, and goals and decisionmaking — related
• Too Good for Drugs shows no discernible effects on student knowledge, attitudes, and values across two randomized controlled trials — reports the opposite
• 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 — related
• WWC improvement indices for Too Good for Violence are +18 percentile points for behavior and +16 for knowledge, attitudes, and values — related
• In a randomized controlled trial, Too Good for Drugs and Violence produced statistically significant gains in perceptions of social and resistance skills and emotional competence — a narrower finding that bears on this claim
• Too Good for Violence shows a substantively important but not statistically significant effect on students' knowledge, attitudes, and values — reports the opposite
• Too Good for Drugs has potentially positive effects on student behavior, with a WWC-computed domain average effect size of 0.25 that is not statistically significant — related
• The WWC rates The Expert Mathematician as having potentially positive effects on middle school mathematics achievement — related