Papers by Vihanga Supasan Kariyakaranage
CAL-Log: Cost-Aware Active Learning with Logarithmic Cognitive Effort Modeling and Online Adaptation to Human Annotation Behavior (2026.acl-srw)
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| Challenge: | Standard uncertainty sampling assumes that annotating a 500-word document requires the same effort as a 50-word tweet, leading to suboptimal resource allocation when documents vary in length. |
| Approach: | They propose a cost-aware AL variant using logarithmic cost modeling where C(x) is the predicted annotation time for document x and L(x), is its token length. |
| Outcome: | Experiments on ten text classification benchmarks show a 3.3 speedup over BADGE and 3.9 over Entropy sampling to reach F1=0.80, with large effect sizes. |