Too Good for Drugs shows no discernible effects on student knowledge, attitudes, and values across two randomized controlled trials¶
Claim · All claims
Evidence · 1 study · quant-synthesisr?·q3·i0negligible
Currency · newest study 2006 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q3 i0 Across two randomized controlled trials, the knowledge, attitudes, and values domain average effect size (0.16) was neither statistically significant nor substantively important. → 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. https://www.mendezfoundation.org
q3 · i0 · quant-synthesis · r?
WWC aggregation of follow-up findings from both RCTs (Bacon 2000: 1,060 sixth-graders; Bacon 2003: 935 grades 3-4 students). Study averages were 0.20 and 0.11, domain average 0.16, all "neither statistically significant nor substantively important"; individual outcomes ranged from 0.08 to 0.27, all ns.
"When the WWC aggregated the results across all outcomes in this domain in each of the studies, the domain average effect size in each of the studies was neither statistically significant nor substantively important."
Discussion¶
Related Claims¶
- 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 — 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
- 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 — 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 has potentially positive effects on student behavior, with a WWC-computed domain average effect size of 0.25 that is not statistically significant — related
- Too Good for Violence shows a substantively important but not statistically significant effect on students' knowledge, attitudes, and values — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
too-good-for-drugs-no-discernible-kav-effects |
title |
Too Good for Drugs shows no discernible effects on student knowledge, attitudes, and values across two randomized controlled trials |
description |
Too Good for Drugs shows no discernible effects on student knowledge, attitudes, and values across two randomized controlled trials |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2006 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — what-works-clearinghouse-2006 |
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