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An Empirical Study of Content Understanding in Conversational Question Answering

AAAI 2020 · Vision-language and multimodal › Visual question answering · approach: Universal VQA models · 5 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Mask previous answer text while retaining its position, rather than removing all conversation history (ablation)QuAC models · QuAC validationF1: 54.1 (.13) -> 62.4 (.20); 55.3 (.03) -> 62.2 (.48)Helped
Mask previous answer text while retaining its position, rather than removing all conversation history (ablation)CoQA models · CoQA validationF1: 63.4 (.11) -> 71.5 (.24); 68.3 (.45) -> 74.0 (.19)Helped
Repeat answer-containing passage text between answer spans at test time (ablation)FlowQA and BERT · QuAC validationF1: 64.4 (0.30) -> 53.3 (0.75); 63.6 (0.16) -> 55.3 (0.74)Hurt
Train without previous-answer position information (ablation)FlowQA and BERT · QuAC validation under repeat attackF1: 56.9 (0.37) vs 53.3 (0.75); 56.5 (0.22) vs 55.3 (0.74)Helped
Repeat answer-containing passage text between answer spans at test time (ablation)FlowQA and SDNet · CoQA validationF1: 76.9 (0.22) -> 72.0 (0.20); 76.4 (0.31) -> 71.8 (0.48)Hurt
Mask previous answer text at inference (ablation)FlowQA · QuAC validationF1: 64.4 (0.30) -> 60.5 (0.54)Hurt
Mask previous answer text at inference (ablation)BERT · QuAC validationF1: 63.6 (0.16) -> 52.6 (1.76)Hurt
Remove previous-answer position information at inference (ablation)FlowQA · QuAC validationF1: 64.4 (0.30) -> 48.1 (0.72)Hurt
Remove previous-answer position information at inference (ablation)BERT · QuAC validationF1: 63.6 (0.16) -> 54.9 (0.08)Hurt
Remove previous-answer position information at inference (ablation)FlowQA · CoQA validationF1: 76.9 (0.22) -> 76.7 (0.36)No clear effect
Shuffle passage sentences (ablation)FlowQA - position · CoQA validationF1: 76.8 (0.42) -> 71.7 (0.25)Hurt
Shuffle passage sentences (ablation)SDNet - position · CoQA validationF1: 75.7 (0.76) -> 70.1 (0.59)Hurt

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