Persona Vectors (Chen et al.)

Entities in the same semantic neighborhood but without a typed relation to this one — candidates for new edges or unrecognized duplicates.

• Persona Vectorconcept0.864
  A linear direction in a language model's activation space that encodes a specific personality trait, enabling monitoring and control of that trait
• Persona vectors as diagnostic instrumentconcept0.823
  The paper's reframing: persona vectors read as signals of internal model organization rather than as behavioral controls
• Persona Vector Arithmeticconcept0.818
  Compositional combination of persona vectors via algebraic operations on activation directions
• Persona Vector Transition Layerconcept0.808
  Specific attention layer where persona representations undergo sharp directional shift and stabilize, identified via cosine similarity heatmaps
• Persona Vector Extraction via Difference-of-Meansmethod0.801
  Core method for extracting persona vectors by contrasting mean activations under persona-eliciting vs. suppressing prompts
• Persona vectors act as gateway features that gate access to broad repertoires of inferential paths already encoded in the weightsclaim0.791
  Interpretive claim about the mechanistic role of persona vectors explaining emergent misalignment
• Persona vectors are present from the earliest available Apertus-8B checkpoint at 1.4% of pretraining (210B tokens)finding0.791
  Replication finding on Apertus confirming early persona formation generalizes across model families
• Persona vectors capture signal specific to their assigned trait, as evidenced by within-trait correlations exceeding cross-trait baselinesclaim0.788
  Author's interpretation establishing that persona vectors are not merely general misalignment indicators