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HAS-QA: Hierarchical Answer Spans Model for Open-Domain Question Answering

AAAI 2019 · Vision-language and multimodal › Visual question answering · approach: Open-domain multimodal QA

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use MAX aggregation over multiple answer spans instead of selecting only the first span (ablation)HAS-QA · QuasarTEM: 0.372 -> 0.432Helped
Use SUM aggregation over multiple answer spans instead of selecting only the first span (ablation)HAS-QA · QuasarTEM: 0.372 -> 0.423Helped
Randomly select an answer span for aggregation instead of using MAX (ablation)HAS-QA · QuasarTEM: 0.432 -> 0.341Hurt
Use SUM aggregation instead of MAX aggregation (ablation)HAS-QA · QuasarTEM: 0.423 -> 0.432No clear effect
Increase the number of candidate start positions in beam search (ablation)HAS-QA · QuasarTEM: 0.428 -> 0.432Helped
Increase the number of candidate end positions in beam search (ablation)HAS-QA · QuasarTEM: 0.428 -> 0.428No clear effect
Condition end-position prediction directly on the selected start positionHAS-QA · QuasarTEMHelped
Add paragraph quality probabilities to weight evidence paragraphs (ablation)HAS-QA · QuasarTEMHelped

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