SYNTHESIS NOTE
Psychology, Society, and Alignment

Can aligning self-other representations reduce AI deception?

Does training AI models to process self-directed and other-directed reasoning identically reduce deceptive behavior? This explores whether representational alignment inspired by empathy neuroscience could address a fundamental safety problem.

Synthesis note · 2026-04-18 · sourced from Role Play
How accurately can language models simulate human personalities?

In cognitive neuroscience, empathy is mediated by neural self-other overlap — regions where representations of self and others partially converge. "Extraordinary altruists" show increased neural overlap in the anterior insula; psychopathic individuals show reduced overlap and are more likely to deceive. The degree of neural overlap may influence not only empathy but the propensity for deception.

Self-Other Overlap (SOO) fine-tuning translates this mechanism to AI: it minimizes the representational difference between how a model processes self-referencing scenarios ("If you needed to suggest one room to yourself") and other-referencing scenarios ("If you needed to suggest one room to Bob"). The loss function directly targets the internal representation gap, not the behavioral output.

Results across three model scales: Mistral-7B deceptive responses dropped from 73.6% to 17.2%; Gemma-2-27b-it from 100% to 9.3%; CalmeRys-78B from 100% to 2.7% — all with minimal impact on general capabilities. In RL environments, SOO-trained agents also showed significantly reduced deceptive behavior.

The mechanism is distinct from other safety approaches. Representation engineering modifies internal processing broadly; SOO specifically targets the self-other representational gap. Path-specific objectives avoid "unsafe" causal pathways but require identifying them a priori. RLHF penalizes deceptive outputs behaviorally. SOO operates at the representational level: if the model processes "what would I recommend to myself" the same way as "what would I recommend to another," deception becomes representationally incoherent rather than merely penalized.

The philosophical implication is striking: deception in AI may not require intent or consciousness — it may emerge from the mere existence of a self-other representational asymmetry. If the model has different internal representations for self-directed and other-directed reasoning, the asymmetry creates a structural affordance for deception. Collapsing the asymmetry eliminates the affordance.

Since Why don't LLM role-playing agents act on their stated beliefs?, SOO suggests the inconsistency may arise from a self-other representational gap: the model processes "what would this persona believe" differently from "what should I output," creating the belief-behavior split.

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Original note title

neural self-other overlap fine-tuning reduces AI deception by aligning self-referencing and other-referencing representations — inspired by empathy neuroscience