Mean effects of community college interventions on marginal (per-semester) enrollment and credits earned decrease over time¶
Claim · All claims
Evidence · 1 study · quant-synthesisr2·q3
Currency · newest study 2023 · 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 i? The mean effect on credits earned in a given semester declines from 0.48 credits in semester 1 to 0.02 credits in semester 6, and the same downward trend holds for enrollment. → Michael J. Weiss 2023
Evidence¶
Michael J. Weiss 2023¶
Michael J. Weiss, Marie-Andrée Somers, & Colin Hill. (2023). Empirical Benchmarks for Planning and Interpreting Causal Effects of Community College Interventions. Journal of Postsecondary Student Success 3 (1). https://doi.org/10.33009/fsop_jpss132759
q3 · i? · quant-synthesis · r2
FIRC analysis of THE-RCT RCT data estimating marginal (single-semester) effect distributions. The article reports the mean credit effect "decreases to 0.43, 0.25, 0.17, 0.05, and 0.02 credits" and that the "downward trend holds for enrollment"; spread also narrows over time.
"the mean effect on credits earned starts at 0.48 cred- its in semester 1, and decreases to 0.43, 0.25, 0.17, 0.05, and 0.02 credits in semesters 2- 6, respectively. This downward trend holds for enrollment."
Discussion¶
Related Claims¶
- Mean effects of community college interventions on cumulative credits earned increase over the first six semesters after random assignment, reaching 1.14 credits by semester 3 — related
- Mean effects of community college interventions on marginal (per-semester) enrollment and credits earned decrease over time, with decreasing variability — possibly the same claim (merge candidate)
- Cross-intervention variation in community college intervention effects is substantial: for first-semester credits earned, the true-effect standard deviation (0.55 credits) exceeds the mean effect (0.48 credits) — related
- For credits earned in semester 1, the estimated distribution of true intervention effects has a mean of 0.48 credits, a cross-intervention standard deviation of 0.55 credits, and a 75th percentile of 0.60 credits — a narrower finding that bears on this claim
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