Overfitting and Underfitting: When a Model Memorizes Too Much or Learns Too Little

📰 Medium · AI

Learn to identify overfitting and underfitting in machine learning models and why it matters for model performance

intermediate Published 3 Jul 2026
Action Steps
  1. Split your data into training, validation, and test sets to evaluate model performance
  2. Monitor validation metrics to catch overfitting, where a model memorizes the training data
  3. Regularize your model to prevent overfitting by adding penalties for complex models
  4. Compare model performance on the training and validation sets to identify underfitting, where a model is too simple
  5. Apply techniques such as early stopping or dropout to prevent overfitting and improve model generalization
Who Needs to Know This

Data scientists and machine learning engineers can benefit from understanding overfitting and underfitting to improve model accuracy and reliability

Key Insight

💡 Overfitting occurs when a model is too complex and memorizes the training data, while underfitting occurs when a model is too simple and fails to capture important patterns

Share This
🚨 Overfitting and underfitting can make or break your ML model! 🚨

Key Takeaways

Learn to identify overfitting and underfitting in machine learning models and why it matters for model performance

Full Article

Yesterday we split our data three ways and saw the validation set catch a network in the act of memorizing instead of learning. Today we… Continue reading on Medium »
Read full article → ← Back to Reads

Related Videos

QR Decomposition is Just Gram-Schmidt with Receipts
QR Decomposition is Just Gram-Schmidt with Receipts
DataMListic
More Trees Won't Fix Your Random Forest
More Trees Won't Fix Your Random Forest
DataMListic
K-Nearest Neighbors is Just a Majority Vote
K-Nearest Neighbors is Just a Majority Vote
DataMListic
Word2Vec — How Words Became Vectors
Word2Vec — How Words Became Vectors
DataMListic
Every Classification Metric is Just Four Counts
Every Classification Metric is Just Four Counts
DataMListic
Lasso Is Just a Laplace Prior
Lasso Is Just a Laplace Prior
DataMListic