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transfer_score.md

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+# Transfer Stability Score (TSS)
+
+The Transfer Stability Score measures how well a model generalizes stability reasoning across different regimes.
+
+---
+
+# Definition
+
+TSS = mean(F1_transfer)
+
+Where F1_transfer represents F1 scores from cross-regime tests.
+
+---
+
+# Interpretation
+
+High TSS indicates that a model has learned general instability reasoning.
+
+Low TSS suggests the model relies on dataset-specific correlations.
+
+---
+
+# Relationship to CSS
+
+CSS measures average performance across datasets.
+
+TSS measures generalization between regimes.
+
+Both metrics should be reported when evaluating models on the Clarus Clinical Stability Benchmark.