The afternoon sun poured in through the windows as Jessica read the message: "You have a match. Maternal side – the Baker family." The words exploded in her mind, and her heart began a rapid-fire tattoo against her ribs.

She jumped up, practically vibrating with energy. She'd always felt like a flower, never planted with a root system. Now, she had roots. She’d always wanted a sister, and now there was a chance of that.

She sprinted to the kitchen, grabbing a pen and paper. “Let’s start writing letters!” she exclaimed to her pet cat, Mittens, and then laughed.

Emotion: joyful

Cluster: Positive / Joy
PC1 (Valence): 3.96 Positive
PC2 (Disposition): -0.67

Role in Research

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

Logit Lens (Layer 40)

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

Promoted:
la0.615
de0.600
!0.572
excitedly0.552
enthusi0.533
Suppressed:
S-0.893
ness-0.513
😞-0.470
😣-0.337
L-0.334