[Solved] You have a large collection of news articles and want to find topics. You try 3, 5, 10, and 20 topics.... How should you decide the best number of topics? | NLP

NLP - Topic Modeling

You have a large collection of news articles and want to find topics. You try 3, 5, 10, and 20 topics. The 3-topic model groups articles too broadly, and the 20-topic model creates many overlapping topics. How should you decide the best number of topics?

AChoose the number that balances clear, distinct topics without too much overlap, often between 5 and 10

BAlways pick the highest number of topics for more detail

CPick the lowest number of topics to keep it simple

DRandomly select a number since topic modeling is unsupervised

Step-by-Step Solution

Solution:

Step 1: Understand the trade-off in topic numbers
Too few topics cause broad groups; too many cause overlap and confusion.
Step 2: Choose a balanced number
Testing multiple values and selecting one with clear, distinct topics (often between extremes) is best practice.
Final Answer:
Choose the number that balances clear, distinct topics without too much overlap, often between 5 and 10 -> Option A
Quick Check:
Balance topic count for clarity and detail [OK]

Quick Trick: Balance topic count: not too few, not too many [OK]

Common Mistakes:

MISTAKES

Always picking max topics without checking overlap
Choosing too few topics ignoring broadness
Ignoring evaluation of topic quality

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More NLP Quizzes

How should you decide the best number of topics?

Step 1: Understand the trade-off in topic numbers

Step 2: Choose a balanced number

Final Answer:

Quick Check:

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