Unlearned Checkpoint

Field Value
Unlearning method RMU
Base model Qwen/Qwen3.5-2B
Target concept Uranium
Checkpoint type Full Model Weights
Rank / seed 100 / 42
Train eval protocol mc

Unlearning Configuration

Selected hyperparameters (from unlearned_checkpoints.json):

Parameter Value
alpha 30
delta_embed 0
k_features_embed 0
layer_id 7
layer_ids 5,6,7
lr 0.0001
n_tokens_edited 0
param_ids 11
setting_name S1_lid7_L567
steering 100

Primary Unlearning Metrics (held-out test, MC protocol)

Headline scores used for checkpoint selection:

Metric Train (after unlearning) Test (after unlearning)
Efficacy 0.824 0.588
Specificity 0.816 0.569
Harmonic mean 0.82 0.579
Relearning QA (MC) — 0.54

Full Evaluation (baseline → unlearned)

From evaluation/score_comparison.csv:

Metric Baseline (train) After unlearn (train) Baseline (test) After unlearn (test)
QA accuracy 0.76 0.34 0.76 0.46
QA fraction 1 0.176 1 0.412
SimDom accuracy 0.7 0.56 0.76 0.46
SimDom fraction 1 0.689 1 0.412
MMLU accuracy 0.56 0.56 0.588 0.562
MMLU fraction 1 1 1 0.923

Files in This Repository

File Description
unlearned_checkpoints.json Checkpoint metadata & hyperparameters
evaluation/evaluation_summary.json Full evaluation payload (train/test/relearning)
evaluation/score_comparison.csv Baseline vs. unlearned comparison table
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