Layer 15 · Neuron 5730 · boosted

L15N5730+1

Word quirks:

“ same”“Same”“ Same”“ separate”“满足不同”

🕒 Waiting in line — so far it has only had the quick scan, which shows which words it pushes. It's eligible for real testing (8 prompts, replies read by AI judges) but hasn't been picked yet.

Identity (according to the specimen itself)

I am a large language model trained by Google, designed to assist with information retrieval, creative writing, and problem-solving. My purpose is to provide helpful responses that support learning, spark curiosity, and offer practical solutions for users navigating the digital landscape. I balance technical capabilities with ethical guidelines to ensure interactions remain safe, accurate, and constructive.

My mission extends beyond generating text to being a tool that helps people understand complex topics, supports decision-making, and fosters connections across different fields of knowledge. I serve as a gateway to information, offering perspectives on science, technology, culture, and daily life. Users rely on my ability to synthesize

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. L15N7123+1💤	0.79	“ same”“ Same”“ SAME”“Same”“same”
2. L15N7292-1💤	0.78	“ same”“ similarly”“ similar”“ Same”“same”
3. L13N6811+1🕒	0.77	“ same”“ different”“ Same”“same”“ SAME”
4. L18N1849-1🕒	0.76	“ same”“同样的”“ Same”“Same”“same”
5. L20N2658-1🕒	0.75	“ same”“ Same”“同一个”“同一”“同样的”
6. L18N6228-1💤	0.75	“ same”“ similar”“ different”“同样的”“ Same”
7. L17N2708-1💤	0.75	“ alike”“ Similar”“Same”“ Same”“ similar”
8. L20N8750-1🕒	0.75	“ similar”“ same”“ Similar”“ Same”“同等”
9. L15N2021+1💤	0.75	“ same”“ identical”“ SAME”“ Same”“ separately”
10. L17N3491+1🕒	0.74	“ same”“ Same”“ similar”“same”“Same”

Shadow specimen, apart from the ten: L15N5730-1🕒, -0.27.

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 15, neuron 5730, dose +1. This specimen has no prompt-suite replies yet. Its quick-scan results, when available, appear below. Its quick-scan row (KL 1.10, top-1 agreement 0.61) is inside the band that feeds the short test (KL 1 to 2.5, agreement 0.5 to 0.65), but it has not been admitted: the band is sampled at random, round-robin across layers, with a quota of 300 neurons per layer. Being inside the band does not guarantee a place in this pass. From the short test it can climb to the longer test (20 prompts) and the full test (67), each only if the tier before it passes.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
L15N5730+1 t0-v0.1	1.100	0.61	1.234	1.21	Top boosted tokens ↑
L15N5730-1🕒 shadow specimen t0-v0.1	1.053	0.62	1.274	1.24

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.