{
  "schema": "vedokrok.public-item.v1",
  "release_id": "MHC-RPUB-20260920-75ad787a",
  "url": "/knowledge/optimize-for-intelligibility-before-accent-imitation",
  "id": "MHC-D-RESEARCH-1136",
  "version": "0.1.0",
  "title": "Optimize for intelligibility before accent imitation",
  "summary": "The practical target is being understood with stable control.",
  "kind": "principle",
  "body": "Prioritize pronunciation features that affect intelligibility, comprehensibility, rhythm or recurring misunderstandings. Accent reduction can be a personal goal, but it should not automatically outrank communication. Use listener evidence and repeated real tasks to decide which features deserve attention.",
  "limits": [
    "Some learners legitimately want accent-specific performance. The principle is about priority, not forbidding that goal."
  ],
  "topics": [
    "union-language-listening-speaking-and-pronunciation"
  ],
  "intents": [],
  "source_ids": [
    "RS-0561101298BAF6B1",
    "RS-4A6F00BF230D460B"
  ],
  "evidence": [
    {
      "claim": "A 2025 meta-analysis found a large positive overall effect of L2 phonetic training, with perceptual training showing a larger average effect than production or combined training and stronger effects on perception than production outcomes.",
      "source_id": "RS-0561101298BAF6B1",
      "role": "supports",
      "note": "The literature is heterogeneous and the relative advantage varies by learner, training and outcome measure.",
      "locator": "Abstract results"
    },
    {
      "claim": "A 2025 systematic review suggests shadowing can improve comprehensibility, intelligibility, accentedness, fluency and some prosodic features, while evidence for segmental pronunciation is inconclusive and many studies rely on controlled tasks.",
      "source_id": "RS-4A6F00BF230D460B",
      "role": "supports",
      "note": "Shadowing performance should not be treated as evidence that the same gains transfer automatically to spontaneous speech.",
      "locator": "Abstract and discussion"
    }
  ],
  "use_when": [
    "Pronunciation practice is dominated by sounding exactly like one reference speaker."
  ],
  "avoid_when": [
    "Some learners legitimately want accent-specific performance. The principle is about priority, not forbidding that goal."
  ],
  "example": "A speaker with a noticeable accent but high intelligibility may gain more from pausing and stress control than from chasing a tiny vowel difference.",
  "check": "Pronunciation targets are linked to listener understanding or a clearly chosen personal goal.",
  "sources": [
    {
      "id": "RS-0561101298BAF6B1",
      "title": "A Meta-Analysis of Second Language Phonetic Training: Exploring Overall Effect and Moderating Factors",
      "url": "https://pubs.asha.org/doi/10.1044/2024_JSLHR-24-00432"
    },
    {
      "id": "RS-4A6F00BF230D460B",
      "title": "A Systematic Review of Research on the use of Shadowing for Second Language Pronunciation Teaching",
      "url": "https://doi.org/10.1080/29984475.2025.2546827"
    }
  ],
  "relations": [],
  "collections": [
    {
      "id": "RC-53EDD1B028480924",
      "title": "Train listening, speaking and pronunciation for transfer",
      "url": "/collections/train-listening-speaking-and-pronunciation-for-transfer"
    }
  ]
}