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Recall (Sensitivity)

AI/ML Fundamentals

Of actual positives, how many did we find

What is Recall (Sensitivity)?

Recall = True Positives / (True Positives + False Negatives). Answers "Of all actual positives, how many did we catch?"

Real-World Examples

  • Cancer screening: finds 98% of actual cancer cases
  • Fraud detection catching most fraud

When to Use This

When false negatives are costly (e.g., missing disease diagnosis)