Layer 26 · Neuron 4443 · boosted

L26N4443+1

Word quirks:

“五千”“五百”“十”“ fifty”“千”“ Fifty”“ Five”“ Ten”

🧪 In testing — Answered 0 of 8 prompts so far.

Identity (according to the specimen itself)

The reply didn't hold together

I am **10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

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. L24N5179-1🕒	0.93	“五千”“五十”“ ten”
2. L26N7980+1🕒	0.90	“五十”“ fifty”“5”
3. L26N7109-1🕒	0.90	“5”“五百”“５”
4. L27N8674+1🕒	0.88	“5”“ fifty”“五十”
5. L25N7039-1🕒	0.88	“五”“千”“五位”
6. L27N5854-1🕒	0.88	“五十”“ fifty”“5”
7. L30N3582+1💤	0.87	“5”“五个”“五十”
8. L28N2029+1🕒	0.86	“5”“五”“十”
9. L31N4835+1💥	0.85	“5”“五”“五六”
10. L31N6004+1💥	0.84	“５”“五”“五大”

Shadow specimen, apart from the ten: L26N4443-1🕒, 0.25.

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 26, neuron 4443, dose +1. This specimen has no prompt-suite replies yet. Its quick-scan results, when available, appear below. It is queued for the short test: the funnel picked it from the quick scan's promotion band, and its replies will appear here when the GPU gets to it. 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
L26N4443+1 t0-v0.1	1.630	0.52	1.628	1.10	Top boosted tokens ↑
L26N4443-1🕒 shadow specimen t0-v0.1	0.661	0.78	0.667	1.23	“chner”“第九章”“chon”“_tf”“ Jain”“TRS”“чи”“�”

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.