Get Grammar, Vocab, Coherence feedback metrics

POST https://api.speechace.co/api/scoring/speech/v9/json?key={{speechace_premiumkey}}&user_id=XYZ-ABC-99001&dialect=en-us

In this Spontaneous Speech Scoring example, we obtain and present feedback metrics for Grammar, Vocabulary, Coherence.

Feedback metrics help the learner identify specific areas of weaknesses within each skill and provide score explainability. For example, a low grammar score could be due to accuracy or range, or simply because the response was too short to showcase sufficient grammatical mastery. The feedback indices provide insight into the reasoning behind the score and direct the learner on how to improve their next attempt.

To obtain the feedback metrics we add the body parameter include_ielts_feedback=1 to the request.

Feedbck Indices:

In the API result JSON the following fields are returned within the speech_score.grammar, speech_score.vocab, speech_score.coherence nodes. Each index has 3 sub-elements:

• score: on a scale of 1 to 10
• level: an interpretation of the score as low/mid/high
• message: a feedback message if the score is low.

An example grammar feedback looks like the following:

{   
"grammar": 
  {
    "overall_metrics": {
      "length": {
         "score": 4,
         "level": "mid"
       },
       "lexical_diversity": {
          "score": 8,
          "level": "high"
       },
       "grammatical_accuracy": {
           "score": 8,
           "level": "high"
        },
        "grammatical_range": {
            "score": 5,
            "level": "mid",
            "message": "Your response has less grammatical range than most advanced speakers. To improve, you should use a wider range of phrasal and clausal structures and verb-argument constructions.",
            "noun_phrase_complexity": {
               "score": 1,
               "level": "low",
               "message": "Your response lacks noun phrase complexity. You should use richer modifiers in noun phrases by using adjectives, relative clauses, prepositional phrases, non-finite elements, determiners, and demonstratives."
            },
            "noun_phrase_variation": {
                "score": 5,
                "level": "mid"
            },
            "verb_construction_variation": {
                "score": 6,
                "level": "mid"
             },
             "adverb_modifier_variation": {
                 "score": 9,
                 "level": "high"
              }
         }
     },
     "errors": [
      {
         "category": "STYLE",
         "message": "Did you mean 'different from'? 'Different than' is often considered colloquial style.",
         "span": [44,48],
         "matched_text": "than",
         "replacements": ["from"]
      }
     ]
 }
}

Grammatical Errors

The grammar.errors node contains a JSON array of grammatical errors found in the response. Each array element is an object with the following properties:

Request Params

Request Body

[{"name"=>"user_audio_file", "value"=>nil, "datatype"=>"null"}, {"name"=>"question_info", "value"=>"'u1/q1'", "datatype"=>"string"}, {"name"=>"include_ielts_feedback", "value"=>"1", "datatype"=>"number"}]

RESPONSES

status: OK

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