{
  "schema": "vedokrok.public-item.v1",
  "release_id": "MHC-RPUB-20260920-75ad787a",
  "url": "/knowledge/build-a-task-bank-for-variation-not-repetition-count",
  "id": "MHC-D-RESEARCH-9023",
  "version": "0.1.0",
  "title": "Build a task bank for variation, not repetition count",
  "summary": "Fifty questions can still be one question wearing different numbers.",
  "kind": "protocol",
  "body": "Classify practice items by the decision they require, the cues that distinguish them, important edge cases and transfer distance. Add items where the bank is thin, not where generation is easiest. Sample across these dimensions so coverage improves as the bank grows.",
  "limits": [
    "A large bank is not automatically representative of the real domain. Sample from actual tasks and update the map when new failure modes appear."
  ],
  "topics": [
    "union-skill-acquisition-career-dominant-focus"
  ],
  "intents": [],
  "source_ids": [
    "RS-B82676FFC4E6D020",
    "RS-05CB28C0C7CF56B3"
  ],
  "evidence": [
    {
      "claim": "A meta-analysis of interleaving found a moderate overall benefit (g = 0.42) but strong moderation by material type and category similarity, including conditions where blocking performed better.",
      "source_id": "RS-B82676FFC4E6D020",
      "role": "supports",
      "note": "Interleaving should be selected for a discrimination problem rather than used as a universal mixing rule.",
      "locator": "Abstract"
    },
    {
      "claim": "A meta-analysis of adaptive training found that effects varied by instructional intervention, with adaptive difficulty showing the strongest results among the examined categories.",
      "source_id": "RS-05CB28C0C7CF56B3",
      "role": "supports",
      "note": "The literature was heterogeneous and much of the context was military training; this does not validate every adaptive-learning product.",
      "locator": "Abstract"
    }
  ],
  "use_when": [
    "When a practice bank contains many items but most are surface copies of the same decision."
  ],
  "avoid_when": [
    "A large bank is not automatically representative of the real domain. Sample from actual tasks and update the map when new failure modes appear."
  ],
  "example": "A grammar bank tracks which tense contrast each sentence requires instead of celebrating another hundred sentences with the same obvious cue.",
  "check": "The bank can show coverage of distinct decisions and confusions, not only item count.",
  "steps": [
    "The bank can show coverage of distinct decisions and confusions, not only item count."
  ],
  "sources": [
    {
      "id": "RS-B82676FFC4E6D020",
      "title": "Similarity matters: A meta-analysis of interleaved learning and its moderators",
      "url": "https://pubmed.ncbi.nlm.nih.gov/31556629/"
    },
    {
      "id": "RS-05CB28C0C7CF56B3",
      "title": "Adaptive training instructional interventions: A meta-analysis",
      "url": "https://pubmed.ncbi.nlm.nih.gov/39083372/"
    }
  ],
  "relations": [],
  "collections": [
    {
      "id": "RC-EA04F47374E04549",
      "title": "Learn new skills, turn them into career evidence, and protect the main development edge",
      "url": "/collections/learn-new-skills-turn-them-into-career-evidence-and-protect-the-main-development-edge"
    }
  ]
}