BLEU & ROUGE-1
Understand BLEU & ROUGE-1
Definition: Metrics used heavily in sequence-to-sequence tasks measuring n-gram overlap between a generated response and a target output. Higher BLEU and ROUGE-1 scores equates to better overlap between the generated and target output.
Usefulness: Evaluate the accuracy of model outputs in comparison to target outputs, enabling a metric to guide improvement and examination of areas where a model has trouble adhering to expected output.