| Dimension | Model | Construct | Impact on Overall | Definition |
| Vocabulary Diversity | Language Use | Vocabulary | Medium | How varied your vocabulary is (adverbs, adjectives, etc). |
Responses with a higher Vocabulary Diversity score (i.e. more parts of speech or word types) correlate mildly with high TOEFL Speaking scores.
For the Vocabulary Diversity dimension, there is a mild relationship between the types of words (e.g. adjectives and adverbs) in your response and your overall TOEFL Speaking score. To earn a high overall TOEFL Speaking score, you probably need to produce more diverse vocabulary than most other test takers.
- the Vocabulary Diversity for this response score is 76 (i.e. it is in the 76th percentile)
- 24% of all responses scored higher; 76% of all responses scored lower
- responses with a Vocabulary Diversity score above t73 are consistent with an overall TOEFL Speaking score in the Good range (i.e. 26-30 overall)
- responses with a Vocabulary Diversity score between 59 and 73 scored in the Fair and the Good ranges (i.e. where the blue/green bars overlap)
- the Impact of this dimension is 2/4, meaning there is a mild correlation between Vocabulary Diversity and your overall TOEFL Speaking score
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