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What do you learn from context? Probing for sentence structure in contextualized word representations

ICLR 2019 · Architectures and efficiency › Attention and transformers · approach: Language model pretraining and induction · 135 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
add contextual encoder representations rather than use lexical representations only (ablation)BERT-large probing model · Macro AverageF1: 75.2 -> 87.3Helped
add contextual encoder representations rather than use lexical representations only (ablation)BERT-large probing model · Winograd coref.F1: 53.0 -> 61.4Helped
add contextual encoder representations rather than use lexical representations only (ablation)BERT-large probing model · SPR1F1: 79.6 -> 85.8Helped
replace concatenation with learned scalar mixing across layers (ablation)GPT probing model · Macro AverageF1: 83.2 -> 84.4Helped
replace concatenation with learned scalar mixing across layers (ablation)BERT-base probing model · Macro AverageF1: 84.8 -> 86.3Helped
replace concatenation with learned scalar mixing across layers (ablation)BERT-large probing model · Macro AverageF1: 84.2 -> 87.3Helped
use deeper BERT-large instead of BERT-base with scalar mixingBERT probing model · Macro AverageF1: 86.3 -> 87.3Helped
use BERT-large instead of ELMocontextual encoder probing · OntoNotes coref.F1: 7.4 F1 pointsHelped
use BERT-large instead of ELMocontextual encoder probing · Winograd coref.F1: 7.8 F1 pointsHelped
train GPT on Billion Word Benchmark text rather than Books Corpus text (ablation)GPT · Probing suiteF1: +0.15 F1 on averageNo clear effect
use randomized orthonormal recurrent and projection weights rather than pretrained weights (ablation)ELMo encoder · Probing suiteF1Hurt
add a width-3 CNN over local context to lexical representations (ablation)Lexical baseline · Probing suiteF1: 72%Helped

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