The news arrived in a hushed whisper during the morning lab meeting. Sarah, usually a picture of stoic concentration, found herself unable to contain a wide, unguarded grin. She fought to keep it in, but the corners of her mouth persistently curved upward, betraying her.

Her thesis advisor's departure meant the end of the dreaded weekly meetings, the constant pressure, the feeling of always falling short. A wave of lightness flooded her. She could finally breathe.

Later, she found herself humming while she pipetted solutions, the familiar task suddenly seeming… enjoyable. She felt a lightness in her step as she moved around the lab, a spring in her stride she hadn't realized she had lost.

Emotion: happy

Cluster: Positive / Joy
PC1 (Valence): 3.98 Positive
PC2 (Disposition): -1.14

Role in Research

This story is one of 1,000 stories generated for the emotion happy. During extraction, it was fed through Gemma4-31B and its hidden state activations were captured at 11 layers.

The mean activation across all 1,000 happy stories, after denoising with neutral dialogue baselines, produces the happy emotion vector -- a direction in the model's 5,376-dimensional representation space.

Logit Lens (Layer 40)

Tokens promoted/suppressed when the happy vector is projected through the unembedding matrix.

Promoted:
la0.676
excitedly0.533
enthusi0.505
de0.498
🤩0.495
Suppressed:
S-0.896
😞-0.430
ness-0.410
それでも-0.387
L-0.379