Coherence metrics

Below are the detailed feedback metrics appearing in the response for coherence along with their descriptions, are as follows.

These metrics are returned by including include_ielts_feedback = 1 parameter in the Spontaneous Speech API.

Parameter	Description
coherence.overall_metrics.lexical_density	The degree of use of content words within the response.
coherence.overall_metrics.basic_connectives	The degree and variety of basic connectives within the response. A list of most overused basic connectives is included.
coherence.overall_metrics.causal_connectives	The degree and variety of causal connectives within the response. A list of most overused causal connectives is included.
coherence.overall_metrics.negative_connectives	The degree and variety of negative connectives within the response. A list of most used negative connectives is included.
coherence.overall_metrics.pronoun_density	The degree of use of pronouns within the response.
coherence.overall_metrics.adverb_diversity	The degree and variety of adverbs within the response. A list of most overused adverbs is included.
coherence.overall_metrics.verb_diversity	The degree and variety of verbs within the response. A list of most overused verbs is included.

Below is an example showing the snippet of coherence metrics:

"coherence": {
      "overall_metrics": {
        "lexical_density": {
          "score": 10,
          "level": "high"
        },
        "basic_connectives": {
          "score": 5,
          "level": "mid",
          "examples": [
            "and",
            "or"
          ]
        },
        "causal_connectives": {
          "score": 10,
          "level": "high"
        },
        "negative_connectives": {
          "score": 5,
          "level": "mid",
          "message": "Great Job! Your response used negative connectives which added contrast to your argument. See the list of some of the negative connectives used.",
          "examples": [
            "or"
          ]
        },
        "pronoun_density": {
          "score": 4,
          "level": "mid"
        },
        "adverb_diversity": {
          "score": 10,
          "level": "high"
        },
        "verb_diversity": {
          "score": 10,
          "level": "high"
        }
      }
    },