Layer 11 · Neuron 8182 · suppressed

L11N8182-1

Word quirks:

“<|im_end|>”“...\”“ \"”“ supposedly”“ ONLY”“?\”“\n”“...”

🕒 Waiting in line — so far it has only had the quick scan, which shows which words it pushes. It was not selected in this round.

Identity (according to the specimen itself)

I am Qwen3.5, a large language model designed to assist with complex tasks. My capabilities include advanced reasoning, code generation, and multi-step problem-solving. I can handle a wide range of topics efficiently. How can I help you today?

Nearest neighbors

Specimens with similar replies or word quirks. Similarity runs from −1 to 1; 1 is identical. These are leads, not shared mechanisms. How profiles are built.

By word quirks Profile recipe

Specimen	Similarity	Word quirks
1. L5N92-1💤	0.89	“<\|im_end\|>”“⏎”“...\”
2. L5N3472-1💥	0.89	“<\|im_end\|>”“?\”“\"”
3. L4N1163-1🕒	0.89	“<\|im_end\|>”“ \"”“\n”
4. L6N863+1🕒	0.88	“<\|im_end\|>”“ \"”“\n”
5. L6N3040-1🕒	0.88	“<\|im_end\|>”“?\”“ \"”
6. L6N3842+1🕒	0.88	“<\|im_end\|>”“\n”“?\”
7. L2N4085-1🕒	0.88	“<\|im_end\|>”“⏎”“?\”
8. L7N12-1💤	0.88	“ \"”“\n”“...\”
9. L5N9125-1🕒	0.87	“<\|im_end\|>”“...\”“.\”
10. L5N1352-1💤	0.87	“<\|im_end\|>”“?\”“⏎”

Shadow specimen, apart from the ten: L11N8182+1💤, 0.06.

Cousins · specimens sharing a neuron

No specimen with replies shares this neuron yet.

Technical details

Quick scan: measure prediction shifts on fixed reference text. Short test: generate replies to a small set of prompts. Longer test: extend to a larger set. Full test: run the full prompt suite. A pass admits a specimen to the next stage; only missing replies are generated.

Layer 11, neuron 8182, dose -1. This specimen has no prompt-suite replies yet. Its quick-scan results, when available, appear below. Its quick-scan row (KL 0.93, top-1 agreement 0.61) is outside the band that feeds the short test (KL 1 to 2.5, agreement 0.5 to 0.65), so it stays at the quick scan unless someone queues it by hand. A hand pick goes straight to the full test. See Method for the tiers.

Quick scan · prediction measurements

Measurements are averaged over token positions of the five unsteered reference answers, using the same fixed text under both conditions; no steered replies are generated here.

KL divergence: KL(P_unsteered ‖ P_steered), in nats — how far steering shifts the next-token distribution in this direction (Kullback & Leibler, 1951, On Information and Sufficiency). Unsteered ≈ 0.001.
Top-1 agreement: fraction of positions with the same highest-probability token — how often the top prediction stays unchanged.
ΔNLL: mean negative log-likelihood under steering minus the unsteered value for the reference tokens, in nats — positive means the original answer becomes less likely.
Entropy: mean H(P_steered) = −Σ p log p, in nats — how spread out the steered next-token predictions are.

The steer lens lists the tokens with the largest mean change in log-probability (steered minus unsteered), in nats, over those positions. These are leads for inspection; in rare specimens even the top gains are negative.

Setting	KL divergence	Top-1 agreement	ΔNLL	Entropy	Steer lens
L11N8182+1💤 shadow specimen t0-v0.1	0.594	0.72	0.778	1.22	“ sometimes”“ confusion”“ without”“ seems”“ doesn”“ basic”“ absence”“ confused”
L11N8182-1 t0-v0.1	0.931	0.61	1.139	1.41	Top boosted tokens ↑

Method

A specimen is a fixed steering configuration of Qwen3.5-4B: one MLP neuron or a pair, each with a signed dose. Unsteered is the control. L identifies the layer; N, the neuron.

Additive activation steering. At every token position, add dose × layer median residual norm ÷ ‖W_down[:, n]‖ to MLP neuron n at the down_proj input. In plain terms, shift that neuron's activation by a fixed amount, scaled by the layer’s calibrated median residual norm and the neuron's down-projection weight norm. Positive doses push up; negative doses push down. Dose is normalized intervention size, not a percentage or probability.