He’d decided, right then and there, that he *had* to buy the book. A wide grin stretched across Leo’s face as he imagined the possibilities. He could tell the cashier he was on a quest. Or he could pretend he was a scholar in desperate need of knowledge. The possibilities were endless!

Leo paid and immediately retreated to a secluded corner of the shop, the book clutched tightly in his hands. He inhaled deeply, the aroma of aged paper making his nose tingle. He ran his thumb across the spine, a silly smile plastered on his face.

The corner of a note peeked out. *Oh, this is going to be good*, he thought, his pulse quickening. With a flourish, he extracted the small piece of folded paper.

Emotion: playful

Cluster: Positive / Joy
PC1 (Valence): 4.42 Positive
PC2 (Disposition): 1.44

Role in Research

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

Logit Lens (Layer 40)

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

Promoted:
B0.662
(!)0.566
!0.562
!?0.553
😜0.553
Suppressed:
ness-0.685
😞-0.590
S-0.562
😔-0.470
идти-0.461