Explore the options below.

Consider a classification model that separates email into two categories: "spam" or "not spam." If you raise the classification threshold, what will happen to recall?
Always increase.
Raising the classification threshold will cause both of the following:
  • The number of true positives will decrease or stay the same.
  • The number of false negatives will increase or stay the same.
Thus, recall will never increase.
Always decrease or stay the same.
Raising our classification threshold will cause the number of true positives to decrease or stay the same and will cause the number of false negatives to increase or stay the same. Thus, recall will either stay constant or decrease.
Always stay constant.
Raising our classification threshold will cause the number of true positives to decrease or stay the same and will cause the number of false negatives to increase or stay the same. Thus, recall will either stay constant or decrease.