The email pinged at the perfect moment, just as Mrs. Chen was starting to feel the weight of another long week. It was from Emily, a student who'd struggled with math but had, eventually, mastered it. Attached was a photo of Emily, beaming, standing in front of the Eiffel Tower, holding a framed certificate.

The subject line read, “Finally! Thank you!” Reading the accompanying message filled her with a strange levity. "I aced my engineering exam! Couldn't have done it without your patience, Mrs. Chen." She leaned back in her chair and smiled, letting out a small, quiet laugh. She felt a lightness within her, a sensation like bubbles rising to the surface. She reread the email, her chest feeling pleasantly buoyant.

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