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Masked language modeling (MLM), a self-supervised pretraining objective, is widely used in natural language processing for learning text representations. MLM trains a model to predict a random sample of input tokens that have been replaced…

Computation and Language · Computer Science 2021-09-07 Atsuki Yamaguchi , George Chrysostomou , Katerina Margatina , Nikolaos Aletras

BERT adopts masked language modeling (MLM) for pre-training and is one of the most successful pre-training models. Since BERT neglects dependency among predicted tokens, XLNet introduces permuted language modeling (PLM) for pre-training to…

Computation and Language · Computer Science 2020-11-03 Kaitao Song , Xu Tan , Tao Qin , Jianfeng Lu , Tie-Yan Liu

Masked language models (MLMs) conventionally mask 15% of tokens due to the belief that more masking would leave insufficient context to learn good representations; this masking rate has been widely used, regardless of model sizes or masking…

Computation and Language · Computer Science 2023-02-13 Alexander Wettig , Tianyu Gao , Zexuan Zhong , Danqi Chen

Masked language modeling (MLM) pre-training methods such as BERT corrupt the input by replacing some tokens with [MASK] and then train a model to reconstruct the original tokens. While they produce good results when transferred to…

Computation and Language · Computer Science 2020-03-25 Kevin Clark , Minh-Thang Luong , Quoc V. Le , Christopher D. Manning

Masked language modeling (MLM) is one of the key sub-tasks in vision-language pretraining. In the cross-modal setting, tokens in the sentence are masked at random, and the model predicts the masked tokens given the image and the text. In…

Computation and Language · Computer Science 2021-09-07 Yonatan Bitton , Gabriel Stanovsky , Michael Elhadad , Roy Schwartz

The pre-training of masked language models (MLMs) consumes massive computation to achieve good results on downstream NLP tasks, resulting in a large carbon footprint. In the vanilla MLM, the virtual tokens, [MASK]s, act as placeholders and…

Computation and Language · Computer Science 2022-11-16 Baohao Liao , David Thulke , Sanjika Hewavitharana , Hermann Ney , Christof Monz

Masked Language Modeling (MLM) is widely used to pretrain language models. The standard random masking strategy in MLM causes the pre-trained language models (PLMs) to be biased toward high-frequency tokens. Representation learning of rare…

Computation and Language · Computer Science 2023-05-25 Linhan Zhang , Qian Chen , Wen Wang , Chong Deng , Xin Cao , Kongzhang Hao , Yuxin Jiang , Wei Wang

Masking tokens uniformly at random constitutes a common flaw in the pretraining of Masked Language Models (MLMs) such as BERT. We show that such uniform masking allows an MLM to minimize its training objective by latching onto shallow local…

Machine Learning · Computer Science 2020-10-06 Yoav Levine , Barak Lenz , Opher Lieber , Omri Abend , Kevin Leyton-Brown , Moshe Tennenholtz , Yoav Shoham

Pre-trained Language Models (PLMs) have been widely used in various natural language processing (NLP) tasks, owing to their powerful text representations trained on large-scale corpora. In this paper, we propose a new PLM called PERT for…

Computation and Language · Computer Science 2022-03-15 Yiming Cui , Ziqing Yang , Ting Liu

The current era of natural language processing (NLP) has been defined by the prominence of pre-trained language models since the advent of BERT. A feature of BERT and models with similar architecture is the objective of masked language…

Computation and Language · Computer Science 2023-07-04 Ed S. Ma

Masked language modeling (MLM) has become one of the most successful self-supervised pre-training task. Inspired by its success, Point-BERT, as a pioneer work in point cloud, proposed masked point modeling (MPM) to pre-train point…

Computer Vision and Pattern Recognition · Computer Science 2022-08-16 Kexue Fu , Mingzhi Yuan , Manning Wang

Even though term-based methods such as BM25 provide strong baselines in ranking, under certain conditions they are dominated by large pre-trained masked language models (MLMs) such as BERT. To date, the source of their effectiveness remains…

Computation and Language · Computer Science 2022-07-07 David Rau , Jaap Kamps

Though achieving impressive results on many NLP tasks, the BERT-like masked language models (MLM) encounter the discrepancy between pre-training and inference. In light of this gap, we investigate the contextual representation of…

Computation and Language · Computer Science 2022-05-16 Yu Lin , Zhecheng An , Peihao Wu , Zejun Ma

How do masked language models (MLMs) such as BERT learn contextual representations? In this work, we analyze the learning dynamics of MLMs. We find that MLMs adopt sampled embeddings as anchors to estimate and inject contextual semantics to…

Computation and Language · Computer Science 2022-04-11 Zhiyi Fu , Wangchunshu Zhou , Jingjing Xu , Hao Zhou , Lei Li

Masked language models (MLMs) such as BERT and RoBERTa have revolutionized the field of Natural Language Understanding in the past few years. However, existing pre-trained MLMs often output an anisotropic distribution of token…

Computation and Language · Computer Science 2022-04-29 Yixuan Su , Fangyu Liu , Zaiqiao Meng , Tian Lan , Lei Shu , Ehsan Shareghi , Nigel Collier

Most works on transformers trained with the Masked Language Modeling (MLM) objective use the original BERT model's fixed masking rate of 15%. We propose to instead dynamically schedule the masking rate throughout training. We find that…

Computation and Language · Computer Science 2024-02-13 Zachary Ankner , Naomi Saphra , Davis Blalock , Jonathan Frankle , Matthew L. Leavitt

Learning to predict masked tokens in a sequence has been shown to be a helpful pretraining objective for powerful language models such as PaLM2. After training, such masked language models (MLMs) can provide distributions of tokens in the…

Computation and Language · Computer Science 2024-02-26 Tom Young , Yunan Chen , Yang You

Masked Language Modeling (MLM) has proven to be an essential component of Vision-Language (VL) pretraining. To implement MLM, the researcher must make two design choices: the masking strategy, which determines which tokens to mask, and the…

Machine Learning · Computer Science 2022-12-13 Siddharth Verma , Yuchen Lu , Rui Hou , Hanchao Yu , Nicolas Ballas , Madian Khabsa , Amjad Almahairi

We propose to pre-train a unified language model for both autoencoding and partially autoregressive language modeling tasks using a novel training procedure, referred to as a pseudo-masked language model (PMLM). Given an input text with…

Computation and Language · Computer Science 2020-03-02 Hangbo Bao , Li Dong , Furu Wei , Wenhui Wang , Nan Yang , Xiaodong Liu , Yu Wang , Songhao Piao , Jianfeng Gao , Ming Zhou , Hsiao-Wuen Hon

Pre-trained models are widely used in the tasks of natural language processing nowadays. However, in the specific field of text simplification, the research on improving pre-trained models is still blank. In this work, we propose a…

Computation and Language · Computer Science 2022-04-19 Renliang Sun , Xiaojun Wan
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