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Robust Text Classification in the Presence of Confounding Bias

AAAI 2016 · Label-efficient and robust learning › Recognition and long-tail · approach: Group-robust classification · 32 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
add back-door adjustment (confounder features at training, sum out at test) with strength v1=10L2 logistic regression · Twitter, large train/test confounder mismatchaccuracy: 60% -> 81%Helped
add back-door adjustment BAZ10 when train and test confounding matchL2 logistic regression · Twitter / IMDb, small correlation differenceaccuracy: approximately 2 points lossHurt
increase adjustment strength v1 from below 0.1 to 10 (ablation)Back-door adjustment · Twitter, large bias differenceaccuracy: 15 points between plateausHelped
add back-door adjustment BAZ10 vs LR across correlation differencesL2 logistic regression · Twitter and IMDbaccuracy (paired t-test): 19 wins, 8 losses, 5 tiesMixed
use back-door adjustment (sum out) instead of modeling joint P(Y,Z|X) and summing outSum out classifier · Twitteraccuracy: SO is 4 to 8 points lower overallHelped
compare subsampling (LRS) with back-door adjustment when label/confounder joint distribution is skewedSubsampling · IMDbaccuracyHurt
add back-door adjustment BAZ10 after confounder flipsL2 logistic regression · Canadian ParliamentaccuracyHelped
subsample to discard pre-shift data (LRS) vs BAZ10 with only 5 post-shift instancesBack-door adjustment · Canadian ParliamentaccuracyHurt

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