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You have a topic model with low coherence. Which combined approach can help improve coherence?

hard📝 Application Q9 of 15
NLP - Topic Modeling
You have a topic model with low coherence. Which combined approach can help improve coherence?
ARemove stopwords and increase number of topics
BReduce dataset size drastically
CAdd more random words to topics
DUse lemmatization and tune number of topics
Step-by-Step Solution
Solution:
  1. Step 1: Identify preprocessing to improve coherence

    Lemmatization groups word forms, improving semantic clarity.
  2. Step 2: Tune number of topics for better model fit

    Adjusting topic count helps find coherent topics; adding random words or reducing data harms coherence.
  3. Final Answer:

    Use lemmatization and tune number of topics -> Option D
  4. Quick Check:

    Preprocessing + tuning improves coherence [OK]
Quick Trick: Clean text and tune topics to boost coherence [OK]
Common Mistakes:
MISTAKES
  • Adding random words thinking it helps
  • Reducing data size too much
  • Ignoring preprocessing steps

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