JOBSTART's completion gain came entirely from GED receipt, with a small significant negative effect on earning a high school diploma¶
Claim · All claims
Evidence · 1 study (2 entries) · causalr2·q3·i1–i2
Currency · newest study 2008 · 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 i2 JOBSTART had a statistically significant positive effect on earning a GED certificate (37.6% vs. 21.1%; effect size 0.49; improvement index +19). → What Works Clearinghouse 2008
q3 i1 JOBSTART had a small, statistically significant negative effect on the likelihood of earning a high school diploma (4.4% vs. 7.5%; effect size -0.34; improvement index -13). → What Works Clearinghouse 2008 (2)
Evidence¶
What Works Clearinghouse 2008¶
What Works Clearinghouse. (2008). WWC Intervention Report: JOBSTART. U.S. Department of Education, What Works Clearinghouse. https://ies.ed.gov/ncee/wwc
q3 · i2 · causal · r2
48-month follow-up of the Cave et al. (1993) randomized controlled trial; Appendix A4.2 reports GED receipt of 37.6% for JOBSTART versus 21.1% for control, mean difference 16.5, effect size 0.49, statistically significant.
"This positive effect on comple-tion came entirely from JOBSTART's positive and statistically significant effect on receiving a GED certificate."
What Works Clearinghouse 2008 (2)¶
What Works Clearinghouse. (2008). WWC Intervention Report: JOBSTART. U.S. Department of Education, What Works Clearinghouse. https://ies.ed.gov/ncee/wwc
q3 · i1 · causal · r2
Same 48-month follow-up of the randomized controlled trial; footnote 6 reports diploma percentages of "4.4% and 7.5% respectively" for JOBSTART and control, and Appendix A4.2 gives effect size -0.34, statistically significant, improvement index -13.
"JOBSTART was found to have a small, but statistically significant, negative effect on the likelihood of earning a high school diploma."
Discussion¶
Related Claims¶
- Career Academies have potentially positive effects on completing school: about 96% of academy students earned a diploma or GED within 8 years of expected graduation versus about 94% of comparison students (effect size 0.27, not statistically significant but substantively important). — related
- The National Guard Youth ChalleNGe Program has potentially positive effects on completing school for at-risk youth, with 61% of the program group reporting a diploma or GED versus 36% of controls 21 months after random assignment — related
- Job Corps has potentially positive effects on completing school: more youth without credentials earned a diploma or GED — related
- JOBSTART's positive completion effect held across gender and parenthood subgroups, with the largest effect for women living with their own children — related
- Job Corps' completion effect came entirely from GED receipt, with a small statistically significant negative effect on earning a high school diploma — related
- JOBSTART increased the likelihood that disadvantaged high school dropouts earned a high school diploma or GED certificate within 48 months of random assignment — related
- JOBSTART youth participated in substantially more education and training during follow-up than control youth — related
- The JOBSTART and control groups showed no statistically significant baseline differences on compared characteristics — related
- New Chance's completion effect came entirely from GED receipt, with a small negative effect on earning a high school diploma — related
- Job Corps substantially increased time spent in education and training relative to the control group during the 48-month follow-up — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
jobstart-ged-gain-diploma-negative-effect |
title |
JOBSTART's completion gain came entirely from GED receipt, with a small significant negative effect on earning a high school diploma |
description |
JOBSTART's completion gain came entirely from GED receipt, with a small significant negative effect on earning a high school diploma |
status |
review |
evidence_strength |
mixed |
newest_evidence |
2008 |
generated |
by process:wiki-ingest on 2026-10-09 |
trust |
unverified — no one has confirmed this page's content |
sources |
2 — what-works-clearinghouse-2008, what-works-clearinghouse-2008-2 |
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