CML: A Contrastive Meta Learning Method to Estimate Human Label Confidence Scores and Reduce Data Collection Cost Bo Dong author Yiyi Wang author Hanbo Sun author Yunji Wang author Alireza Hashemi author Zheng Du author 2022-05 text Proceedings of the Fifth Workshop on e-Commerce and NLP (ECNLP 5) Shervin Malmasi editor Oleg Rokhlenko editor Nicola Ueffing editor Ido Guy editor Eugene Agichtein editor Surya Kallumadi editor Association for Computational Linguistics Dublin, Ireland conference publication dong-etal-2022-cml 10.18653/v1/2022.ecnlp-1.5 https://aclanthology.org/2022.ecnlp-1.5/ 2022-05 35 43