{
  "schema_version": 1,
  "id": "implementation-intentions-meta-boundary-2024",
  "canonical_url": "https://brali-lifeos.github.io/evidence/implementation-intentions-meta-boundary-2024/",
  "json_url": "https://brali-lifeos.github.io/evidence/implementation-intentions-meta-boundary-2024/index.json",
  "decision": "support-existing",
  "decision_label": "Supports existing guidance",
  "reviewed_at": "2026-09-11",
  "reviewed_by": "Brali Evidence Reviewer",
  "source": {
    "title": "The when and how of planning: Meta-analysis of implementation intentions in 642 tests",
    "url": "https://doi.org/10.1080/10463283.2024.2334563",
    "type": "meta-analysis",
    "doi": "10.1080/10463283.2024.2334563",
    "citation_text": null,
    "study_design": null,
    "population": null,
    "intervention_or_exposure": null,
    "outcomes": []
  },
  "supported_claim": "Cue-response implementation intentions are a well-supported self-regulation mechanism; contingent if-then formats performed better on average in the reviewed literature.",
  "unsupported_or_overstated_claims": [
    "Every if-then sentence guarantees behavior change.",
    "Aggregate effect sizes apply to every productivity task."
  ],
  "limitations": [
    "The meta-analysis aggregates many populations, goals, outcomes and implementation-intention variants, so its average effect is not a guaranteed effect size for one productivity task or one person.",
    "Reported moderators such as motivation, contingent if-then form and rehearsal describe variation across the evidence base; they do not establish one universally optimal Brali recipe.",
    "The evidence supports the implementation-intention mechanism broadly, not fixed numbers of plans, fixed rehearsal counts, fixed time windows, or productivity estimates.",
    "The reviewed synthesis does not validate Brali's exact wording, interface or reminder implementation as a separately tested intervention."
  ],
  "target_hack_ids": [
    "if-then-trigger-plan"
  ],
  "target_protocol_ids": [
    "brali:if-then-trigger-plan"
  ],
  "risk_flags": [],
  "notes": "Merge into existing WOOP/task-initiation surfaces when overlapping rather than creating duplicate content. Keep the executable form explicit: If [observable cue], then I will [specific action]."
}