Qwen's internal body map shifts measurably when its hand is 'removed'
Sauers_ · x · 2026-11-14
A probing experiment shows that telling Qwen its right hand was removed measurably shifts the model's internal body-map representation for that hand (layer 27), while leaving other body parts unchanged — a change far larger than minor edits like removing a glove.
The methodology compares internal states across conditions, normalizing distances against typical inter-spot differences, averaged over 8 chats. Notably, a lost hand and a lost foot push Qwen's states in the same direction, and the model still reports feeling pressure on the removed hand — an almost phantom-limb response.
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