{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.lambdacism","code":"thing-q538657","url":"https://ver.cy/models/thing/q538657/","name":"lambdacism","alternateNames":["perception of English /r/ and /l/ by Japanese speakers"],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.STA"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"Lambdacism, in this sense, is difficulty pronouncing l sounds, which may involve omission, substitution or distortion of an expected l sound and does not by itself establish a clinical disorder.","purpose":"Enable an agent to recognise, document and compare difficulty pronouncing l sounds while distinguishing it from expected language or dialect variation and other uses of the term lambdacism.","scope":{"in":["Difficulty producing expected l sounds is the defining concern.","Omission, substitution or distortion of an expected l sound belongs within this sense.","Speech evidence can describe patterns across words and sound positions.","Interpretation accounts for the speaker's language and dialect.","Uncertainty about whether a reported pattern reflects a pronunciation difficulty belongs within this model."],"out":["Comprehensive diagnosis and treatment of speech sound disorders remain outside this model.","The complete phonology or history of a language remains outside this model.","Substitution of l for another expected sound is outside this sense unless it also documents difficulty pronouncing l.","Stylistic repetition of l sounds or letters remains outside this sense.","Lambda notation in mathematics, computing and physics remains outside this model."],"boundaries":[]},"distinguishingFeatures":["The difficulty concerns an expected l sound rather than the mere presence of l in speech.","Descriptions identify the expected l sound and its observed omission, replacement or distortion.","A pronunciation claim requires speech evidence or an explicitly qualified phonetic account; spelling alone does not establish it.","Expected language and dialect differences do not by themselves establish a pronunciation difficulty.","The historical label alone does not establish a clinical disorder or its cause."],"structure":{"bundles":[{"id":"sense-and-boundary","name":"Sense and boundary","description":"Establish which meaning of lambdacism an assertion uses.","layers":[{"id":"definition-attribution","name":"Definition attribution","description":"Attach each interpretation to its lexical authority.","findings":[{"id":"pronunciation-senses","name":"Pronunciation senses","description":"Dictionary.com includes substitution by l and a broader unusual-pronunciation sense. These require separate recognition rules. [Dictionary.com](https://www.dictionary.com/browse/lambdacism)","questions":[{"text":"Does the cited authority mean lateral substitution, unusual pronunciation of l, or both?","id":"pronunciation-senses-q01","kind":"definition"},{"text":"Which source, edition and passage establish the intended sense?","id":"pronunciation-senses-q02","kind":"provenance"}]}]},{"id":"stylistic-boundary","name":"Stylistic boundary","description":"Separate repetition in language from a change in pronunciation.","findings":[{"id":"written-and-spoken-repetition","name":"Written and spoken repetition","description":"Etymonline records an older writing-related use concerning excessive l. Whether the registry intends this sense remains unresolved. [Etymonline](https://www.etymonline.com/word/lambdacism)","questions":[{"text":"Is the example about repeated letters, repeated sounds or replacement of another sound?","id":"written-and-spoken-repetition-q01","kind":"boundary"},{"text":"What stated comparison makes the repetition excessive?","id":"written-and-spoken-repetition-q02","kind":"measurement"}]}]}]},{"id":"segment-and-environment","name":"Segment and environment","description":"Represent the actual speech pattern independently of its label.","layers":[{"id":"correspondence-direction","name":"Correspondence direction","description":"Identify the reference sound and the observed production.","findings":[{"id":"lateral-output-test","name":"Lateral output test","description":"For the substitution sense, require a documented reference-to-output pair rather than an unspecified pronunciation difference.","questions":[{"text":"What segment is expected under the named reference system, and what phone is observed?","id":"lateral-output-test-q01","kind":"measurement"},{"text":"Does the output become lateral, or is the direction reversed?","id":"lateral-output-test-q02","kind":"boundary"}]}]},{"id":"phonetic-conditioning","name":"Phonetic conditioning","description":"Locate environments that permit or constrain the observed pattern.","findings":[{"id":"environment-specific-realisation","name":"Environment-specific realisation","description":"Record syllable position and neighbouring sounds before generalising a lateral outcome across a speaker's speech.","questions":[{"text":"In which syllable positions and segmental environments does the lateral outcome occur?","id":"environment-specific-realisation-q01","kind":"measurement"},{"text":"Which comparable environments retain the reference segment?","id":"environment-specific-realisation-q02","kind":"boundary"}]}]}]},{"id":"attestation-and-frequency","name":"Attestation and frequency","description":"Connect the classification to inspectable examples and reproducible counts.","layers":[{"id":"speech-attestation","name":"Speech attestation","description":"Preserve the evidence underlying a pronunciation judgement.","findings":[{"id":"recoverable-lateral-token","name":"Recoverable lateral token","description":"Link each claimed production to a recording location or documented transcription, retaining ambiguity where the output cannot be resolved.","questions":[{"text":"Which recording timestamp or source passage supports the claimed lateral production?","id":"recoverable-lateral-token-q01","kind":"provenance"},{"text":"Is the lateral identification clear, disputed or unavailable for direct checking?","id":"recoverable-lateral-token-q02","kind":"measurement"}]}]},{"id":"sense-specific-counting","name":"Sense-specific counting","description":"Choose a denominator appropriate to substitution or repetition.","findings":[{"id":"eligible-token-denominator","name":"Eligible token denominator","description":"Count lateral substitutions against eligible reference segments; assess stylistic repetition separately against a declared sound or letter baseline.","questions":[{"text":"Which tokens qualify for the denominator under the selected sense?","id":"eligible-token-denominator-q01","kind":"measurement"},{"text":"How would repeated words, uncertain transcriptions or a different comparison corpus affect the result?","id":"eligible-token-denominator-q02","kind":"measurement"}]}]}]},{"id":"interpretation-and-next-action","name":"Interpretation and next action","description":"Control how observations become broader claims and guide further investigation.","layers":[{"id":"pattern-level","name":"Pattern level","description":"Distinguish individual, community and historical interpretations.","findings":[{"id":"generalisation-evidence","name":"Generalisation evidence","description":"Require evidence appropriate to the scale of the claim, including multiple speakers for community claims and dated correspondences for historical claims.","questions":[{"text":"Does the evidence establish a token, a recurring speaker pattern, a community pattern or a historical correspondence?","id":"generalisation-evidence-q01","kind":"boundary"},{"text":"Which speakers, situations or dated forms support that level of generalisation?","id":"generalisation-evidence-q02","kind":"provenance"}]}]},{"id":"classification-limits","name":"Classification limits","description":"Translate uncertainty into proportionate next steps.","findings":[{"id":"evidence-before-intervention","name":"Evidence before intervention","description":"Use the model to describe and investigate the pattern; any clinical interpretation requires a separately supported assessment.","questions":[{"text":"What additional evidence would resolve the disputed sense, output sound or reference variety?","id":"evidence-before-intervention-q01","kind":"action"},{"text":"Is a proposed next step linguistic documentation, stylistic analysis or a separately justified clinical assessment?","id":"evidence-before-intervention-q02","kind":"action"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-confidence-notes","name":"Check these first","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these check these first hold for the sense of lambdacism this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-kinds","name":"Kinds and varieties","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these kinds and varieties hold for the sense of lambdacism this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these real-world use hold for the sense of lambdacism this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of lambdacism this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of lambdacism this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Explain lambdacism and related speech patterns.","Refer a person to a speech and language therapist."],"mustNot":["Mock a person for their speech.","Diagnose a person's speech disorder.","Treat a regional accent as a disorder."],"requiresHuman":["Recommending therapy for a child."]},"ethics":{"considerations":["Speech differences are often stigmatized.","Dialects and accents deserve respect."],"affectedParties":["People with speech differences","Children"]},"owners":{"steward":"Nobody owns the concept; therapists answer for diagnoses.","roles":[],"masterSystems":[]},"relations":[{"target":"Q4133283","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.lambdacism","Wikidata: Q538657 (https://www.wikidata.org/wiki/Q538657)"]},"properties":{"applicability":"not-applicable","items":["Attributed sense: lateral substitution | unusual lateral pronunciation | stylistic l repetition | unresolved","Reference-to-output correspondence: IPA reference segment linked to observed phone, with reference variety or reconstructed stage","Conditioning environment: syllable position, neighbouring segments, stress, word boundary and speech task","Lateral substitution rate: lateral outcomes / eligible reference-segment tokens; report numerator, denominator and sampling rule","L repetition frequency: l sounds per 100 phones or l letters per 100 letters, kept separate and accompanied by a comparison corpus","Observation level: token | speaker pattern | community pattern | historical correspondence | text","Classification state: unassessed | supported under named sense | ambiguous | unsupported"]},"recognition":{"applicability":"optional","items":["Audible omission, substitution or distortion of an expected l-sound can identify the pronunciation pattern being described.","Comparison across words and sound positions helps distinguish a recurring l-sound difficulty from an isolated slip.","Interpretation depends on the speaker's language and dialect because an expected pronunciation difference is not itself a disorder."]},"capabilities":{"applicability":"required","items":["Classify a candidate example under an explicitly attributed sense of lambdacism.","Annotate reference segments, observed lateral outputs and their phonetic environments.","Calculate substitution or repetition frequencies using sense-specific denominators.","Compare speakers, varieties, periods or texts while preserving their reference conventions.","Request additional recordings, transcriptions or textual comparisons when classification remains ambiguous."]},"hazards":{"applicability":"required","items":["Treating a language or dialect difference as a disorder can cause stigma and inappropriate intervention.","Using the historical label without describing the sounds can confuse l-sound difficulty with substitution of l for another sound.","Assuming every pronunciation difficulty has the same cause can delay appropriate assessment."]},"interfaces":{"applicability":"required","items":["The International Classification of Diseases 11th Revision, issued by the World Health Organization, includes developmental speech sound disorder as a potentially relevant classification when its diagnostic requirements are met."]},"context":{"applicability":"required","items":["Lambdacism is encountered in speech descriptions and speech-language assessment when discussing difficulty producing l-sounds.","Because historical usage varies, records should describe the actual sound pattern and the speaker's language rather than rely on the label alone."]}},"sources":[{"title":"Wikidata item Q538657: lambdacism","url":"https://www.wikidata.org/wiki/Q538657","note":"identity and sense of the item"},{"title":"Wikipedia: Lambdacism","url":"https://en.wikipedia.org/wiki/Lambdacism","note":"general description of the item"}],"openQuestions":["Which lexical sense and originating source were intended when vr.tr.lambdacism was registered?","Should unusual production of l remain within this entry alongside substitution toward l, and which specialist authorities support that boundary?","Does the registry intend to include the historical stylistic sense concerning excessive l in writing?","How do relevant linguistic traditions distinguish lambdacism, lallation, lateralisation and rhotacism?","Which language-specific reference descriptions and annotation protocols can support reproducible classification without treating variety differences as errors?"],"resources":{"spec":"/models/things/publications/thing-q538657/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q538657/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T10:52:45Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T12:16:33+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties."},"score":1.0}}