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Can Bad Teaching Induce Forgetting? Unlearning in Deep Networks Using an Incompetent Teacher

AAAI 2023 · Continual learning › Continual fine-tuning of LLMs · approach: Machine unlearning by selective forgetting · 113 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use competent and incompetent teachers to selectively transfer retain and forget informationResNet18 unlearning · CIFARSuper20, Rocket forgottenD_f accuracy: 82 -> 2±0.40Helped
Use competent and incompetent teachers to selectively transfer retain and forget informationResNet18 unlearning · CIFARSuper20, Rocket forgottenD_r accuracy: 85.78 -> 85.05±0.61No clear effect
Use competent and incompetent teachers to selectively transfer retain and forget informationResNet18 unlearning · CIFARSuper20, Rocket forgottenZRF: 0.87 -> 0.99Helped
Replace ResNet34 incompetent teacher with ResNet18 (ablation)Competent/incompetent teacher unlearning · CIFARSuper20, Rocket forgottenD_f accuracy: 1 -> 15Mixed
Replace ResNet34 incompetent teacher with a random predictor (ablation)Competent/incompetent teacher unlearning · CIFARSuper20, Rocket forgottenD_f accuracy: 1 -> 5Mixed
Replace a randomly initialized teacher with a partially trained teacher (ablation)Competent/incompetent teacher unlearning · CIFARSuper20, Rocket forgottenJS-Divergence: 0.04 -> 0.02Helped
Increase retain data used from 50% to 100% (ablation)LSTM unlearning · Human Activity Recognition, Person 1 forgotten, 1 epochZRF: 0.69 -> 0.79Helped
Increase unlearning epochs from 1 to 5 (ablation)LSTM unlearning · Human Activity Recognition, Person 1 forgotten, 10% retain dataZRF: 0.62 -> 0.75Helped
Increase learning rate from 0.0001 to 0.1 (ablation)LSTM unlearning · Human Activity Recognition, Person 1 forgotten, 2 epochs and 30% retain dataZRF: 0.59 -> 0.96Helped
Use a partially trained incompetent teacher instead of a randomly initialized teacher (ablation)Class-level unlearning · CIFAR10, one class forgottenD_f accuracy: 4.22 -> 0Helped

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