A Multichannel Biomedical Named Entity Recognition Model Based on Multitask Learning and Contextualized Word Representations

Table 9

Performance comparison of adopting multitask learning.

	Precision	Recall	F1-score
JNLPBA
Single-task	71.8	79.7	75.6
Multi-task	72.6	79.6	76.0
	+0.8	-0.1	+0.4
NCBI-disease
Single-task	87.2	88.6	87.9
Multi-task	88.2	89.2	88.7
	+1.0	+0.6	+0.8