The old piano sat in the corner of the living room, its keys yellowed with age. David approached it slowly, his fingers hesitating above the keys. He sat down, the worn cushion sinking slightly under his weight.

He closed his eyes, recalling his grandmother's lessons, the clumsy attempts at playing "Mary Had a Little Lamb." He played a single note, then another, the sound a bit out of tune. A smile touched his lips, and he began to play the song from start to finish.

Emotion: nostalgic

Cluster: Nostalgia / Reflection
PC1 (Valence): 1.00 Positive
PC2 (Disposition): -1.93

Role in Research

This story is one of 1,000 stories generated for the emotion nostalgic. 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 nostalgic stories, after denoising with neutral dialogue baselines, produces the nostalgic emotion vector -- a direction in the model's 5,376-dimensional representation space.

Logit Lens (Layer 40)

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

Promoted:
H0.677
L0.647
시절0.611
nostalgic0.609
fondly0.609
Suppressed:
--0.564
either-0.525
or-0.497
-0.487
l-0.449