Decision tree construction Decision trees that are too large are susceptible to a phenomenon known as overfitting a tree pruning step can be performed to reduce the size of the decision tree Pruning helps by trimming the tree branches in a way that improves the generalization error. 1/30/2021 PATTERN RECOGNITIONDecision tree construction Decision trees that are too large are susceptible to a phenomenon known as overfitting. A tree pruning step can be performed to reduce the size of the decision tree. Pruning helps by trimming the tree branches in a way that improves the generalization error. 1/30/2021 PATTERN RECOGNITION 10