Module 1: Basics and Background
  Lecture 3: Error Measures
 

                                            




 

Errors
  • Positives (): objects that are "true" answers for a query
  • Negatives (): objects that are not answers for the query
 
  • For any querying algorithm,
 
  • True Positives (TP): Answers that have been found
 
  • True Negatives (TN): Non-answers that have not been found
 
  • False Positives (FP): Non-answers that have been found
 
  • False Negatives (FN): Answers that have not been found