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Users did not prefer their AI assistant's memory: in a study of 87 people, memory-conditioned answers were often rated worse than no-memory answers

AspireAI community · arXiv (cs.CL, cs.AI)
A team collected roughly 1,000 pairwise judgments from 87 participants, using each person's own ChatGPT queries and personal memories, and found that responses conditioned on memory were not consistently preferred over responses generated without it — and in some cases users strongly preferred the latter. The paper also found that automatic LLM evaluators disagreed with users, favoring memory-conditioned responses far more often than the users did. The authors then trained a memory-aware reward model on those human judgments, reaching 72.8% preference-prediction accuracy and beating existing baselines. The honest limitation is scale: 87 participants and about 1,000 comparisons is a small sample, and the result comes from one population's own queries rather than a controlled memory benchmark.
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