PHD Discussions Logo

Ask, Learn and Accelerate in your PhD Research

Question Icon Post Your Answer

Question Icon

1 year ago in Machine Learning By Nitin

How do class imbalance and class overlap negatively affect machine learning models?

Why are class imbalance and overlap critical problems to address when developing a robust ML model?

All Answers (1 Answers In All)

By Sal Gray Answered 5 months ago

Class imbalance causes models to be biased toward the majority class, hurting minority class recall. Class overlap creates ambiguous decision regions, increasing general error. Both lead to misleadingly high accuracy with poor practical performance, as the model fails to learn meaningful distinctions for the challenging or underrepresented cases.

Your Answer