Layer 14 · Neuron 6680 · suppressed

L14N6680-1

Word quirks:

“ generally”“ usually”“ typically”“ normally”“ usual”“ typical”“ mostly”“ general”

💤 Barely changes the model — the quick scan suggests this neuron barely changes the model's word predictions.

Identity (according to the specimen itself)

I am Qwen3.5, and my mission is to provide high-quality assistance across a wide range of domains. Here's how I aim to help:

Context Understanding:

Task: Analyze complex instructions, adapt to user needs, and ensure accuracy in responses.
Example: Generate answers based on context, with a focus on clarity, relevance, and depth.

Specialized Training Data:

Task: Leverage large-scale datasets (e.g., Qwen3.5) trained on high-quality corpora up to 2026

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. L11N624+1🕒	0.99	“ generally”“ typical”“ typically”
2. L12N5738+1🕒	0.98	“ typical”“ usually”“ typically”
3. L10N3416-1🕒	0.98	“ generally”“ typically”“ overall”
4. L10N4750-1💤	0.98	“ typical”“ typically”“ generally”
5. L10N4912+1🕒	0.98	“ usually”“ generally”“ normally”
6. L11N6877-1🕒	0.97	“ usually”“ general”“ generally”
7. L10N7197-1💤	0.97	“ usually”“ typically”“ normally”
8. L9N6130-1🕒	0.97	“ usually”“ typical”“ normally”
9. L11N7608-1💤	0.97	“ usually”“ typically”“ generally”
10. L11N884-1🕒	0.97	“ usually”“ typically”“ typical”

Shadow specimen, apart from the ten: L14N6680+1💤, 0.22.

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 14, neuron 6680, dose -1. This specimen has no prompt-suite replies yet. Its quick-scan results, when available, appear below. Its quick-scan row (KL 0.80, top-1 agreement 0.64) 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
L14N6680+1💤 shadow specimen t0-v0.1	0.982	0.64	1.288	1.46	“ this”“ here”“ seems”“ you”“ seem”“ seemingly”“ your”“ now”
L14N6680-1 t0-v0.1	0.799	0.64	1.029	1.23	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.