Effectiveness of interventions to reduce character-counting errors

Determine whether fine-tuning, additional supervision targeted at character-level counting, or architectural adjustments reduce error rates on the character-counting task evaluated in this study.

Background

Although the study identifies late-layer components that suppress correct character-count signals, it focuses on diagnosing failures rather than fixing them.

The authors explicitly state that they have not tested whether training or architectural interventions can reduce these errors, leaving the practical effectiveness of such interventions unresolved.

References

We have not yet tested whether fine-tuning, additional supervision, or architectural adjustments could reduce these errors.

From Early Encoding to Late Suppression: Interpreting LLMs on Character Counting Tasks  (2604.00778 - Datta et al., 1 Apr 2026) in Section: Limitations