Recall

How it is used

Recall matters most when missing a case is costly, for example failing to flag a tumor on a scan. In medicine the same measure is called sensitivity. It is reported together with precision or combined with it in the F1 score.

Example sentences

1. For the screening model, we care more about recall than precision.

2. Recall on the rare class is only 40%, so most of those cases are missed.

Common collocations

• high recall
• recall rate
• precision and recall
• recall at k

Related terms

• precisionOf all the cases a model marked as positive, the share that really were positive. High precision means few false alarms.
• F1 scoreA single number that combines precision and recall by taking their harmonic mean. It is high only when both precision and recall are high.
• confusion matrixA table that shows, for each true class, how many examples the model assigned to each class, so you can see at a glance which classes it mixes up.
• class imbalanceA situation in which some classes in a dataset have far more examples than others, for example 990 normal transactions for every 10 fraudulent ones.

This word in other fields

The same English word can have a different meaning in another field:

• recall · Software Engineering
• recall · Data Science & Analytics
• recall · Automotive
• recall · Food Science & Technology
• recall · Dentistry

More terms: Evaluation and Metrics

• test set
• accuracy
• validation set
• benchmark
• cross-validation