| name | heterogeneity-investigation |
| description | Explain why different studies reach different conclusions — heterogeneity investigation protocol. Budget: 30 studies, 30 effect sizes, 50 web searches. |
| dependencies | {"tactics":["effect-size-extraction","evidence-synthesis-planning","quality-assessment-protocol"],"sops":["data-extraction-form","effect-size-planning","heterogeneity-source-analysis","inclusion-criteria-design","meta-analysis-synthesis","pico-formulation","publication-bias-assessment","risk-of-bias-assessment","sensitivity-analysis-design"]} |
Heterogeneity Investigation Strategy
Design a protocol to investigate and explain between-study heterogeneity — why studies of the same question reach different conclusions.
Purpose
When a meta-analysis reveals substantial heterogeneity (I2 > 50%, significant Q-test, large tau2), this strategy designs the investigation protocol: subgroup analyses, meta-regression, moderator identification, and outlier diagnostics. Produces the investigation plan, not the computation.
Budget
| Resource | Floor | Target |
|---|
| Studies identified | 20 | 30 |
| Effect sizes extracted | 20 | 30 |
| Web searches | 35 | 50 |
| Moderator candidates | 5 | 10+ |
| Quality assessments | 15 | 30 |
Budget gate: cannot exit until 80% of floor met.
State Ledger
<HARD-GATE>
| Metric | Current | Floor | Target | Status |
|--------|---------|-------|--------|--------|
| Studies found | 0 | 20 | 30 | BLOCKED |
| Effect sizes planned | 0 | 20 | 30 | BLOCKED |
| Web searches done | 0 | 35 | 50 | BLOCKED |
| Moderators identified | 0 | 5 | 10+ | BLOCKED |
| Quality assessed | 0 | 15 | 30 | BLOCKED |
</HARD-GATE>