"Learn to play the ukulele," the list beckoned. Sarah plucked at the strings of the small instrument, the sound slightly off-key but filled with promise. Her mother's handwriting was a comforting presence on the list.

She’d spent the entire morning practicing chords, her fingers gradually getting used to the fretboard. A small, satisfied sigh escaped her lips as she strummed a particularly pleasing sequence. The sun streamed through the window, illuminating the dust motes dancing in the air.

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
γγ‚Œγ§γ‚‚-0.387
L-0.379