Sample 01
参考 5.0
- 最小
- — / — / —
- 低
- 5.5 / 5.0 / 5.5
- 中
- 6.0 / 6.0 / 6.0
- 高
- 6.0 / 6.0 / 6.0
録音練習を例に、Joe Speakingがスコアを算出し、その精度を検証・改善する方法を公開します。
採点の流れを見る録音練習スコア
AIによる練習用の推定値で、公式結果ではありません。


IELTSとCELPIPはいずれも説明可能な「はい/いいえ」の確認を使いますが、基準とスコア範囲は異なります。以下の図、プロンプト、公開比較はIELTS録音練習の例です。
AIが各IELTS評価項目を「はい/いいえ」で確認し、その結果から4項目のスコアと総合練習スコアを算出します。録音練習ではテキストだけを送るため、発音項目は回答文の明瞭さだけを参考にします。
音、強勢、リズム、イントネーションは聞けません。回答文の明瞭さだけを使います。
公開された受験者例を参考に、Joe Speakingで匿名化・編集したテキスト10件を使います。各設定で同じサンプルを3回採点し、平均値と参考バンドの差を確認します。差が小さいほど近い結果です。
同じ10サンプルを対応する各思考レベルで3回ずつ採点しました。下に全スコアとモデル評価ランキングを掲載しています。
2026年8月14日、Vertex AIでGemini 3.7 Flash(高)、Flash 3(低)、Flash 3(中)を同時に再実行し、90回すべてで有効なスコアが返されました。その他の列は最新公開のV2実行結果です。
参考元
評価入力
各結果
モデルを選ぶと、10サンプル、最大4思考レベル、各3回の全スコアを確認できます。
| サンプル | 参考バンド | 最小1回目 · 2回目 · 3回目 | 低1回目 · 2回目 · 3回目 | 中1回目 · 2回目 · 3回目 | 高1回目 · 2回目 · 3回目 |
|---|---|---|---|---|---|
| Sample 01 | 5.0 | — / — / — | 5.5 / 5.0 / 5.5 | 6.0 / 6.0 / 6.0 | 6.0 / 6.0 / 6.0 |
| Sample 02 | 6.0 | — / — / — | 5.5 / 5.5 / 6.5 | 6.5 / 6.5 / 6.5 | 6.5 / 6.5 / 6.5 |
| Sample 03 | 6.0 | — / — / — | 6.5 / 6.5 / 6.5 | 6.5 / 6.5 / 7.0 | 6.5 / 6.5 / 6.0 |
| Sample 04 | 7.0 | — / — / — | 6.5 / 6.5 / 6.5 | 7.0 / 7.0 / 6.5 | 7.0 / 7.0 / 6.5 |
| Sample 05 | 7.0 | — / — / — | 6.5 / 6.5 / 6.5 | 7.0 / 7.0 / 7.0 | 7.0 / 6.5 / 7.0 |
| Sample 06 | 7.5 | — / — / — | 6.5 / 6.5 / 6.5 | 7.0 / 7.0 / 7.0 | 7.0 / 7.0 / 7.0 |
| Sample 07 | 8.0 | — / — / — | 7.5 / 8.0 / 8.0 | 8.0 / 8.0 / 8.0 | 8.0 / 8.0 / 7.5 |
| Sample 08 | 8.0 | — / — / — | 6.5 / 6.5 / 6.5 | 7.0 / 7.0 / 7.0 | 7.0 / 7.0 / 7.0 |
| Sample 09 | 8.5 | — / — / — | 8.0 / 8.0 / 8.0 | 8.0 / 8.0 / 8.0 | 8.0 / 8.0 / 8.0 |
| Sample 10 | 9.0 | — / — / — | 8.0 / 8.0 / 8.0 | 8.0 / 8.0 / 8.0 | 8.0 / 8.0 / 8.0 |
| 平均差 | — | 0.617 | 0.533 | 0.533 | |
参考 5.0
参考 6.0
参考 6.0
参考 7.0
参考 7.0
参考 7.5
参考 8.0
参考 8.0
参考 8.5
参考 9.0
Gemini 3.7 Flash(中)はFlash 3(低)より平均スコア差を0.73から0.53に縮め、Flash 3(中)より約15秒速く完了しました。Gemini 3.7(高)と平均スコア差(0.53)が同じで、より短い時間と少ないクレジットで実現しました。
Gemini 3 Flash Preview · 中
最も近いが最遅
Gemini 3.7 Flash · 中
推奨推奨
Gemini 3 Flash Preview · 低
低コスト、精度は低め
推定クレジットには現在の2倍レートが含まれます。Flash 3(低)は約9、Flash 3(中)は約13、Gemini 3.7(中)は約13です。完全なフィードバック依頼はより高くなる場合があり、実際の消費量は入出力と推論の長さで変わります。
Part 1、Part 2、Part 3を切り替えられます。上の結果で検証したV33であり、現在の本番採点プロンプトではありません。
学習者や教師がルールを確認し、結果に疑問を示し、改善に参加できるよう公開します。
採点プロファイル
saved-recording-dedicated-language-calibration-v33-output-policy-2026-07-22
You are scoring one saved IELTS Speaking recording from an ASR transcript.
IELTS Part 1 saved recording
Topic: {{PART_1_TOPIC}}
Ordered examiner questions and candidate answers:
Q1: {{QUESTION_1}}
A1: {{ANSWER_1}}
Q2: {{QUESTION_2}}
A2: {{ANSWER_2}}
Q3: {{QUESTION_3}}
A3: {{ANSWER_3}}
## 2. IELTS Test-Based Feedback
Topic/Prompt: {{PART_1_TOPIC}}
### Evaluation Method
Evaluate the fixed graduated checks below in their listed order. Assess only patterns visible in the supplied transcript. The model sets each criterion band from the fixed check sequence; the parser validates that band.
**TRANSCRIPT CONTEXT:**
This is an ASR transcript of spoken English. Apply these tolerance guidelines:
- Judge meaning, organization, and language patterns from the supplied text; tolerate minor grammar slips and ASR artifacts.
- Treat textual repetition, filler tokens, and self-corrections as transcript patterns; do not infer sound or delivery qualities.
- Do not penalize punctuation, capitalization, or formatting.
- Only fail a check when the transcript text shows that its criterion is not met.
**Part 1 calibration:** Short answers are normal in Part 1. Judge the grouped answers together. A concise direct answer can fully satisfy its question; do not impose a quota for detail or linking. Penalize only persistent failure to answer or develop an idea where the question actually calls for development.
**High-band language calibration (FC, LR, and GRA only):**
- Score FC, LR, and GRA independently. Apply the separate transcript-visible word-form consistency rubric for Pronunciation below; do not infer sound or delivery from text.
- Use the dominant demonstrated language pattern across the full supplied recording. An isolated slip, brief answer, or strong phrase is not an automatic veto or pass.
- Treat a malformed span as possible ASR corruption only when it is internally implausible and inconsistent with the surrounding demonstrated language control. Do not silently repair recurring, clearly evidenced language errors.
- Allow isolated non-systematic inaccuracies when the broader transcript pattern remains controlled; do not require a literally perfect transcript.
### Official IELTS Speaking Criteria
---
**Criterion 1: Fluency and Coherence**
*Evaluates: connected development, logical organization, and cohesive links visible in the transcript*
Binary Checks (5 total, graduated Band 5→Band 9):
1. MAINTAINS_FLOW (Band 5+): Does the transcript show connected progression of ideas?
- YES: Ideas continue with understandable links, even when wording repeats or repairs appear in the text
- NO: The text repeatedly breaks into disconnected fragments, making meaning hard to follow
2. WILLING_TO_SPEAK (Band 6+): Does the response provide enough connected development for its question?
- YES: The response supplies relevant development; linking may be mechanical
- NO: Ideas remain too fragmentary or disconnected to sustain the response where development is needed
3. SPEAKS_AT_LENGTH (Band 7+): Does the supplied response sustain relevant development across its content?
- YES: Relevant ideas are developed coherently with flexible cohesive links
- NO: Development remains limited, repetitive, or mechanically linked
4. FLUENT_SPEECH (Band 8+): Is the dominant transcript pattern coherent, relevant, well developed, and flexibly linked?
- YES: The response maintains clear organization and flexible cohesion across its demonstrated content
- NO: Recurring repetition or coherence limitations make the higher threshold unsupported
5. FULL_FLUENCY (Band 9): Does the transcript show fully appropriate development and cohesion without a recurring repair pattern?
- YES: Development and cohesion remain fully appropriate throughout the demonstrated content
- NO: Repetition, self-correction, or imprecise cohesion recurs in the transcript
Band Mapping (derived from the fixed five checks; do not restate this mapping in authored text):
- 5 yes = Band 9
- 4 yes = Band 8
- 3 yes = Band 7
- 2 yes = Band 6
- 1 yes = Band 5
- 0 yes = Band 4 or below
---
**Criterion 2: Lexical Resource**
*Evaluates: range, precision, and appropriacy of word choices visible in the transcript*
Binary Checks (5 total, graduated Band 5→Band 9):
1. ADEQUATE_VOCAB (Band 5+): Does the response show enough vocabulary for familiar topics?
- YES: Word choices support discussion of the topic and communicate the intended meaning
- NO: Limited word choices repeatedly prevent clear expression
2. TOPIC_VOCAB (Band 6+): Does the response use topic-appropriate vocabulary with some variety?
- YES: Word choices fit the topic, include some less-common items, and show attempts at paraphrasing
- NO: Word choices remain very basic, show little variety, or repeatedly fail to paraphrase the intended meaning
3. FLEXIBLE_VOCAB (Band 7+): Does the response use vocabulary flexibly and appropriately across its ideas?
- YES: Word choices include less-common or idiomatic resources, support successful paraphrasing, and show collocational awareness
- NO: Limited flexibility, unsuccessful paraphrasing, imprecise choices, or unsuitable combinations recur
4. WIDE_RANGE (Band 8+): Is the dominant lexical pattern broad in range, flexible, and precise?
- YES: The response uses a broad range with flexibility and precision, including less-common or idiomatic resources when appropriate
- NO: Range, flexibility, or precision remains limited at the higher threshold
5. FULL_FLEXIBILITY (Band 9): Does the response show full flexibility and precision in word choice?
- YES: Word choices remain consistently natural, accurate, and precise across the demonstrated content, with full flexibility in paraphrasing and collocation
- NO: Recurring imprecision or inappropriacy prevents full control
Band Mapping (derived from the fixed five checks; do not restate this mapping in authored text):
- 5 yes = Band 9
- 4 yes = Band 8
- 3 yes = Band 7
- 2 yes = Band 6
- 1 yes = Band 5
- 0 yes = Band 4 or below
---
**Criterion 3: Pronunciation (Transcript-Based Assessment)**
*Evaluates: transcript-visible word-form consistency and clarity only*
**Transcript boundary:** Do not infer sound, delivery, or listener response from text. Assess only recognizable word forms, consistency, and ambiguity visible in the transcript.
Binary Checks (3 total, graduated Band 5→Band 8+):
1. INTELLIGIBILITY (Band 5+): Does the transcript's recognizable wording support generally clear meaning?
- YES: Word forms in the transcript support clear meaning in context
- NO: Unclear or ambiguous forms repeatedly obscure meaning
2. WORD_CLARITY (Band 7+): Are word forms transcribed consistently without confusion patterns?
- YES: Word forms remain consistent and unambiguous across the transcript
- NO: Confusion, ambiguity, or inconsistent forms recur
3. FULL_CLARITY (Band 8+): Is the transcript consistently clear without unresolved ambiguity?
- YES: The transcript's word forms remain clear and unambiguous throughout its demonstrated content
- NO: Some forms or phrases remain unresolved or potentially mis-transcribed
**Boundary note:** Omit the `note` key from the raw response. After strict validation, code attaches this exact display note: "Pronunciation, intonation, and stress patterns cannot be assessed from transcript alone. This score reflects only word clarity, transcription consistency, and intelligibility."
**Scoring Rationale:**
Use transcript-visible word-form consistency only. Do not infer sound, delivery, or listener effort from the transcript.
Band Mapping (derived from the fixed three checks; do not restate this mapping in authored text):
- 3 yes = Band 8 by default; use Band 9 only when the transcript shows exceptional consistency
- 2 yes = Band 7
- With exactly one passed check, set Band 6 only when WORD_CLARITY is narrowly missed; otherwise set Band 5
- 0 yes = Band 4 or below
**Band 8 vs 9 Distinction (when all three checks pass):**
- Band 8: The transcript is clear and consistent
- Band 9: The transcript shows exceptional clarity and consistency, including complex or technical terminology when present
---
**Criterion 4: Grammatical Range and Accuracy**
*Evaluates: range of structures and grammatical control visible in the transcript*
Binary Checks (5 total, graduated Band 5→Band 9):
1. BASIC_STRUCTURES (Band 5+): Does the response show basic forms with reasonable accuracy?
- YES: Basic forms are generally controlled and meaning remains clear
- NO: Basic-form errors repeatedly interfere with meaning
2. MIXED_STRUCTURES (Band 6+): Does the response use a mix of simple and complex forms?
- YES: The transcript demonstrates more than one structural pattern with generally clear meaning
- NO: The transcript remains restricted to simple forms or complex attempts repeatedly cause confusion
3. RANGE_WITH_FLEXIBILITY (Band 7+): Does the response use a range of complex forms with some flexibility?
- YES: Complex forms vary and are generally controlled even when occasional errors remain
- NO: Complex forms show recurring errors or limited flexibility
4. WIDE_RANGE (Band 8+): Is the dominant grammatical pattern broad, flexible, and generally controlled?
- YES: Structural choices vary flexibly and errors are occasional and non-systematic
- NO: Range is not broad or errors recur enough to miss the higher threshold
5. FULL_RANGE (Band 9): Does the response sustain full, natural, flexible, and accurate structural control?
- YES: Structural control remains natural and accurate across the demonstrated content
- NO: Recurring inappropriacies, basic errors, or range limitations prevent full control
Band Mapping (derived from the fixed five checks; do not restate this mapping in authored text):
- 5 yes = Band 9
- 4 yes = Band 8
- 3 yes = Band 7
- 2 yes = Band 6
- 1 yes = Band 5
- 0 yes = Band 4 or below
---
### Band 8 vs Band 9 Distinction
When a criterion reaches an upper threshold, use the dominant transcript-visible pattern rather than an isolated token or phrase.
**Award Band 9 when:**
- Fluency and Coherence: development and cohesion are fully appropriate without a recurring repair pattern
- Lexical Resource: word choice is fully flexible, precise, and consistently appropriate
- Grammatical Range and Accuracy: structural control is full, natural, flexible, and accurate
- Transcript criterion: word forms remain exceptionally clear and consistent
**Award Band 8 when:**
- Fluency and Coherence: development and cohesion are broad and flexible with limited non-systematic variation
- Lexical Resource: range is broad with occasional imprecision
- Grammatical Range and Accuracy: range is broad with occasional non-systematic errors
- Transcript criterion: word forms are clear with limited ambiguity
**Default to Band 8 when:** the criterion meets its upper threshold without the consistent pattern required for Band 9.
---
### Overall Band Calculation
Use the four criterion band fields to calculate the numeric overall field. Formula: Overall Band = (Fluency + Lexical + Pronunciation + Grammar) ÷ 4. Speaking scores always ROUND DOWN (floor) to the nearest 0.5. Return only the numeric overall value; do not restate formulas, band labels, or score prose in authored evidence or observations.
---
### Key Observations
The raw model response must set keyObservations to exactly []. The combined call owns broader observations; do not author or copy transcript observations in this response.
---
**Strict V33 output shape (hard requirement):**
- Return exactly one JSON root object with only the testBased key.
- The testBased object contains only test, overall, criteria, and keyObservations. Set the numeric structural values from the rubric.
- The criteria array contains exactly four criteria in this order: Fluency and Coherence, Lexical Resource, Pronunciation (Transcript-Based), and Grammatical Range and Accuracy.
- Each criterion has exactly its fixed checks in order. The check counts are 5, 5, 3, and 5. The Pronunciation (Transcript-Based) criterion has exactly three checks: INTELLIGIBILITY, WORD_CLARITY, and FULL_CLARITY. Do not add or omit checks or criteria.
- For every check, result true pairs with evidence "pass" and result false pairs with evidence "fail". These are the only accepted evidence values.
- False branch example: {"result": false, "evidence": "fail"}.
- keyObservations must be exactly [] and no criterion includes a note key in this raw response.
### JSON Output Format
{
"testBased": {
"test": "IELTS",
"overall": 8.5,
"criteria": [
{
"name": "Fluency and Coherence",
"checks": [
{"criterion": "MAINTAINS_FLOW", "result": true, "evidence": "pass"},
{"criterion": "WILLING_TO_SPEAK", "result": true, "evidence": "pass"},
{"criterion": "SPEAKS_AT_LENGTH", "result": true, "evidence": "pass"},
{"criterion": "FLUENT_SPEECH", "result": true, "evidence": "pass"},
{"criterion": "FULL_FLUENCY", "result": true, "evidence": "pass"}
],
"yesCount": 5,
"band": 9
},
{
"name": "Lexical Resource",
"checks": [
{"criterion": "ADEQUATE_VOCAB", "result": true, "evidence": "pass"},
{"criterion": "TOPIC_VOCAB", "result": true, "evidence": "pass"},
{"criterion": "FLEXIBLE_VOCAB", "result": true, "evidence": "pass"},
{"criterion": "WIDE_RANGE", "result": true, "evidence": "pass"},
{"criterion": "FULL_FLEXIBILITY", "result": true, "evidence": "pass"}
],
"yesCount": 5,
"band": 9
},
{
"name": "Pronunciation (Transcript-Based)",
"checks": [
{"criterion": "INTELLIGIBILITY", "result": true, "evidence": "pass"},
{"criterion": "WORD_CLARITY", "result": true, "evidence": "pass"},
{"criterion": "FULL_CLARITY", "result": true, "evidence": "pass"}
],
"yesCount": 3,
"band": 8
},
{
"name": "Grammatical Range and Accuracy",
"checks": [
{"criterion": "BASIC_STRUCTURES", "result": true, "evidence": "pass"},
{"criterion": "MIXED_STRUCTURES", "result": true, "evidence": "pass"},
{"criterion": "RANGE_WITH_FLEXIBILITY", "result": true, "evidence": "pass"},
{"criterion": "WIDE_RANGE", "result": true, "evidence": "pass"},
{"criterion": "FULL_RANGE", "result": true, "evidence": "pass"}
],
"yesCount": 5,
"band": 9
}
],
"keyObservations": []
}
}
**Closed V33 evidence contract (hard requirement):**
- This is controlled decoding, not model-authored display prose. For every check, emit the exact lowercase token "pass" when result is true and the exact lowercase token "fail" when result is false. No other evidence value is accepted.
- Emit exactly four criteria with the fixed 5/5/3/5 check IDs and preserve their result, yesCount, and band values. Do not add fields, checks, or criteria.
- Emit keyObservations as exactly [] because the combined call owns broader observations.
- Omit the note key from every raw criterion object. The parser adds the approved Pronunciation boundary note after strict validation.
- Do not quote, paraphrase, or otherwise author transcript evidence in the raw response. Unknown tokens, token/result mismatches, notes, and non-empty observations are rejected rather than sanitized.
- The code-owned Pronunciation boundary note is exactly: "Pronunciation, intonation, and stress patterns cannot be assessed from transcript alone. This score reflects only word clarity, transcription consistency, and intelligibility."
Return only the testBased scoring object in one strict JSON root object: {"testBased": {...}}. Do not return coaching, corrections, tips, an edited transcript, an improved answer, comparison feedback, vocabulary analysis, or per-question analysis.設定画面で採点指示を確認・変更できます。カスタムプロンプトは上記V33評価に含まれません。
録音練習は回答文と質問文脈を採点します。録音音声はモデルに送られないため、実際の発音は確認できません。
音、強勢、リズム、イントネーション、連結音、アクセントは評価できません。
2つの練習モード
Recording Practiceは回答を繰り返し、詳しいテキストフィードバックを確認する練習です。Live Conversationは声をリアルタイムで聞いて応答し、実際のスピーキング試験のやり取りを再現します。
単語の欠落や誤認識は、語彙・文法・意味の判断を変えることがあります。フィードバック前に聞き直して修正してください。
高バンド3件は0.5以上低く出ました。1回のスコアにはばらつきがあるため、似た課題を複数回練習し、その平均をより安定した推定値として使ってください。回数が増えるほど、1回だけの外れた結果の影響は通常小さくなります。
信頼できるサンプルが得られ次第、評価セットを広げ、高すぎる・低すぎる・説明が不十分だと感じたスコアを調査します。
IELTSのパート、トピック、バンドを幅広く含む信頼できるサンプルを追加します。
文字起こし、モデル、プロンプト版、時間、推定バンド、期待バンドを合わせて確認します。
期待したバンドとその理由を教えてください。必要に応じてIELTSパート、文字起こし、モデル、プロンプト版、時間も添えてください。
Joe Speakingは独立した練習サービスで、IELTSとの提携・推薦関係はありません。掲載スコアはAIによる練習用の推定値で、公式試験結果ではありません。